since i hit 3rd trimester ive been nauseous all over again and having diarrhea 2-4 times a day. is…

since i hit 3rd trimester ive been nauseous all over again and having diarrhea 2-4 times a day. is this normal? anyone else experience drastic changes from one trimester to the next. my 1st trimest i lost over 10 lbs from nausea and vomiting.. my 2nd trimester i had anxiety and acid reflux, now i feel like my 1st trimester all over again only worse nausea and i have been on dicleges since 14 weeks which isnt helping much now.