help please!!!

Brit • Married to the most wonderful man, have a 1year old and baby 2 on the way in may!!
I am 15 weeks pregnant and since Monday I haven't been able to keep anything down. I eat 3 meals a day still but everything I eat gets thrown right back up about 10 minutes later... I stopped taking my prenatals cuz the last kind I was taking was making me sick so I switched and have stopped taking them again. Idk what to do, I have a ob apt tomorrow and I plan on asking them but I was wondering if anyone else had these same symptoms at all?