Pregnancy question I think

Abby
I am very lactose intolerant and also can not eat red meat or I get an instant migraine. Since I found out I am pregnant I have been eating eggs for breakfast every morning and having cheese here and there. I also ate a ground beef burger the other day and didn't bother my stomach at all! Has this happened to anyone else? I am assuming it's because I am pregnant because I've never been able to eat this stuff before.