Sudden Nausea & Dizziness

Katie
All of a sudden this morning I was standing in the kitchen and almost fainted. My husband helped me to bed and now I am shaky and nauseous. I had some eggs and toast earlier and they went down okay, I just feel like I can't do anything but lie in bed right now or I'll fall over.
I felt like this a few times early in the first trimester, but I am 16 weeks and have had a really good 2nd trimester so far. This is kind of out of the blue. Anyone have this? Should I call the doctor? No spotting or anything that I can tell.