I'm so sick, is this normal?

I'm 39+4 and I've been so sick all week and last week too but it's only getting worse. I have non stop diarrhea everything I eat goes right through me, I'm nauseous and sometimes throw up after I eat like my stomach can't handle food. I have a cold right now so I can hardly breathe but I'm just wiped out and dizzy all the time, I sleep half the day and really only get up to go to the bathroom to get sick... my doctor doesn't seem concerned but I feel absolutely awful. Is this just typical end of pregnancy sick or should I be concerned? I can handle the hot crabby tiredness, but the nausea and diarrhea is scaring me it just won't stop. I'm getting very fed up 🤕😓