So I'm a new vegan. I've been completely off of animal products for a couple of weeks, but had given up most of them nearly two months ago. My decision was motivated primarily by health issues, but I am also appalled at the unkind treatment of animals in modern farming.

Since giving birth to my son a couple of months ago, I get incredibly sick if I eat meat or dairy. When I first got pregnant, I had been trying to make the transition, but for some reason I was craving beef during my pregnancy and it wasn't making me sick, so I wound up eating it then. Due to this, my family and my future in-laws have gotten used to feeding me meat every time I have dinner with them. They also constantly try to feed me dairy even though I don't like it and am lactose intolerant. 

My family and my future in-laws are very unsupportive. I live in the midwest where people eat meat, cheese, and butter with every meal. I have explained that these foods make me very sick, yet they won't support my decision. They have seen the aftermath of feeding me beef, eggs, and cheese, so they know I'm not just making it up. They try to hide meat and dairy in food and then try to feed it to me. I am constantly being told that I'm being difficult and ungrateful for not eating what they cook. I am constantly being asked to make an exception "just this one time." I am ridiculed for eating differently than everyone else does. And to top it all off, I get constant lectures about how I can't possibly be getting enough protein, and how unhealthy veganism is in general (which is obviously a load of crap). Basically, they treat me like a child that is a picky eater. 

I have tried to ignore them, but like I said, they keep trying to sneak meat and dairy into food that they give me, which is just so incredibly disrespectful and wrong (their disrespectful behavior and attitude extends to other aspects of life too). My solution would normally be to just stop eating with them, but my fiance is adament about having dinner with his family at least once a week.  I lost that battle. He is supportive otherwise and eats a lot of the same foods I do and then cooks his meat himself. I have tried bringing some food that I can eat to share (its rude to show up empty handed anyway), but I got my head bitten off for it. I can't eat what's on the table at their house, I can't bring other food, and I can't get out of going over there.

I'm not willing to change and give them their way. Veganism is so much healthier, and I feel a thousand times better than I have in years. What do I do?