I'm currently 23 weeks and 3 days. This morning I felt shaky and off, sort of sick. But I just tried to drink water and eat. One of my friends wanted to do a photo shoot and I agreed to be a model for her. Everything was going great! It wasn't too hot out because I wasn't sweating or anything. I all of a sudden got extreme nausea after I was feeling better from earlier. I thought I was going to throw up so I just took a moment then my vision started to tunnel and it started getting black everywhere. Then I could feel my body getting heavy and I couldn't stand anymore so I rushed to the car to sit down. I was sweating but I wasn't hot. I went to the store got a candy bar and ate it, then we started taking pictures again and then the nausea started to hit again. I've been home and I still feel out of it and weak. I called the on call OB. They just said to rest and see how I feel tomorrow. Should I be worried? Anyone else have this happen?