29 weeks pregnant and cannot eat or drink anything...?

I am 29 weeks pregnant and since yesterday morning I haven't been able to keep anything down besides a few bites of pizza last night and some ginger ale a little while ago. I also have (tmi I know) diarrhea. Im thinking it was from traveling as I got back from out of state early yesterday morning. Im wondering if anyone had any suggestions on how to feel better(nausea wise), I feel so drained and doesn't help I have an active toddler as well :) Thanks everyone