Normal to get sick again ?

Hi ladies I got sick from 8wks-14 or 16 wks. And after I felt so much better, got some of my energy back. Now I’m 24 wks and those sick feels seem to be coming back as of 2 days ago. It sucks because I’m on vacation, but I don’t feel my best. Not sure if I’m dehydrated maybe or if I ate something bad. I feel the empty stomach sickly feeling and my body is warm. Is it normal to get nausea again in the 2nd trimester ?