not feeling so good today

Just not feeling so good today. Went out for a walk with my fiance to get some food and I could barely eat. I went because I know I need to get out and walk and at least try to interact or do something, but the walk really was like a bit of torture. I just wanted to be home. And now that I am home, I really don't want to be awake. I really just want to lie down. I've been bargaining in my head: I went out for a while, can't I lie down for a while now?
I got an email about a possible project that just made me really anxious. I really don't want to take it. I really don't think I can.
On our walk about, my fiance asked if there's anything I'd like to do since he's home with me this week. Back in the day, I would have suggested a road trip to explore somewhere and take pictures, eat good food....but I just don't have it in me.
When oh when is this going to lift? I have to keep believing that it will, but it's really hard sometimes.