Yipes, I get really sick from those fumes as well. I would pick up a mask at the hardware store. Get something lightweight that you can stand wearing for long periods. I can see why the packing would be overwhelming. Take it a little at a time and rest in between. Like they say, "You can't eat an elephant in one bite." Blessings and hugs.

Start now, so that you can do a little every day. Don't try to do a whole room in a day. Start with one dresser drawer. Start putting a week's worth types of clothing (i.e. underwear) in a suitcase, pack the rest. Hire cleaners to come in after the movers.
Make sure you have a fan for the new place so you can blow those icky smells away.
If you can afford it rent a storage unit and move what you can to the storage unit. After the main move, then you can slowing empty the storage unit.
I am in the midst of a move myself. I do have a husband who is a great help. However, we have lived in our old house for 19 years. You collect a lot of "stuff" that isn't necessary. I had to get in the right frame of mind to just throw it out or donate it.
New construction? Be prepared for delays. We thought our new home would be ready by the 15th of September. We are still waiting for a firm closing date.

I would suggest a good air purifier. We have one we move room to room when there are smells that get to me, it helps a lot.
Keeping the windows open as much as possible at first would help, as well as (oddly) having the carpets steamed even though they are new.

I spent this past Spring packing up, we are living an hour from our house that's on the market in a mobile we bought to live in transitionally as living in the house for sale was too difficult. My husband is a slob and I don't always have the energy to clean up after him. Anyway, I packed all the stuff I would not be using for the next 6 months first. So now it would be summer clothes, and etc. Then I got totes with covers for a lot of the everyday things like the bathroom or sewing stuff, etc. Then I could see through them and just open them to get what I needed. For the longer storaged stuff I would pick a box a day and fill it, tape it, mark it and have my husband put it in the one room we chose as the storage area. It's not going to be perfect, you'll end up buying stuff you have, or losing things until you are entirely unpacked but all you can do is the best you can. The totes have been the biggest help by far, I'm using them here to switch out seasonal clothes and to store linens. Once we do sell and then buy our forever home we'll keep the storage area for a little while and bring it over slowly so I'm not overwhelmed. This all is such a luxury. When my kids were little we moved every year and I packed it all up and unpacked it all within 2 wks. Ugh, never again -
Oh, wanted to mention. If they have not painted your new place yet, have them use non allergenic paint with little or no VOCs, it will help a lot!

I had a move earlier this year at short notice and can totally understand your feelings. Sometimes the thought of it makes us ill never mind trying to actually do it! You have some good advice from people here. If anything, I would advise you to get rid of as much stuff as possible. I mean really purge - we all have so many possessions and while it is nice to have things, each one of them requires some of your ENERGY. Don't look at the $ cost of an item, think about the ENERGY cost to you of packing it up, finding space to pack it, recording it somehow, unpacking, finding a place for it and looking after it. All that stuff bleeds us dry. You have a great opportunity to totally minimalise and that is such a good thing for people with CFS in my opinion. Also, if you give things away you are you are helping others whether it be through a charity shop (goodwill?) or personally. Think of all that good karma, lol and think of all that time and energy you will save and the space you will have! Secondly, keep notes in one place of what you need to do and what you have done. It is so easy to forget something. I used a project book meant for students. It is an update on list making - and could be really useful when you are overwhelmed by the move and are unsure of where documents are, if you paid bills, if you changed address with organisations, who your new doctor will be etc. Thirdly, if, like me, you take lots of medicines to manage your various CFS related illness, try to get a supply to keep you going past the move as soon as possible and put it all in a lidded container with a label on. Then you have no worries about medicines near or just after the move. I wish you well. You are a smart cookie to ask for help and doing so now just shows that you realise you need to be organised. I have no doubt you will manage it. Perhaps be good to yourself with extra VitaminC, BComplex and some CoQ10 to help your tired immune system to cope. Do keep everyone posted on how you are managing - it will help sort things in your mind to write it down, and you may get more specific helpful advice as you are going along. I too send blessings and hugs. You CAN do it!

I have a good one! Years ago I found out that formaldehyde is in a lot of new stuff, most furniture, carpeting, etc. People can breathe it in for up to 7 years. And the good news.... 2 houseplants per room is enough to counteract this. Read that years ago.

That's my suggestion, houseplants. At least 2 in every room will help clean the air and minimize your symptoms. Isn't that the coolest?