I tested negative for strep throat flu and cold but i seemed to throw up my food after coughing a little i don't wanna confuse pregnancy symptoms with?

It happens: Coughing & spitting up use some of the same muscular structures. When you are sick and pregnant there is enough going on that you can lose control of keeping your food down during a cough. I wouldn't consider the issue a disease, just a transient mechanical issue.

R/o Pertussis: Studies show posttussive vomiting can sometimes be associated with whooping cough and as you are pregnant they plan to give you TDAP in the 3rd trimester but if you have multiple paroxysms of coughing 10 times in a row I think worth MD visit to endure you and baby safety