Feta cheese and my baby. what is going on?

so, i had a salad the other day, with feta cheese, and i threw it up. same thing happened to me today. i was blaming it on the milk i was drinking, but my boyfriend told me its probably the cheese. so i started reading online about feta cheese and read its potentially harmful to your fetus. my question, as silly as it sounds, is: will my body reject things that could harm my unborn child, or is it still just shitty morning sickness? (almost 5 months, everybody says morning sickness should have subsided. i think thats a crock)