Yes, I had a hard time with a lot of foods including meat, chicken and especially fish. You could try eating more eggs (for protein) and maybe ask your dr. about iron supplements. Breakfast cereal usually contains a lot of iron and so does cooked beans and lentils. Baked potatos with skin on also have iron.
Your prenatal vitamin should be enough, but I'd ask about it anyway.
I am still having a hard time with chicken and fish so I don't know when you will want to eat it. It's funny but the body has a strange way of letting us know what we should eat more and less of. You may start craving ice cream (for the calcium) or banana (potassium) etc... so I wouldn't worry too much. Your body will let you know what it wants.