Has anyone else developed random food allergies in their 3rd trimester. I went to the ER exactly 2 weeks ago because I woke up having trouble breathing and covered from scalp to chest in hives and my palms started itching. By the time my hubby and I made it to the ER I was covered from head to toe in hives. We have since tried eliminating foods that I could be allergic to and we think we have it narrowed down to tomatoes. OB didn't seem concerned the next day.