Maybe pregnant 4 months PP

I've had 4 periods already and I was on birth control for 1 month, ( got off of it for medical reasons.) And I'm 10 days late. I took a test yesterday and it was negative but I've been feeling extremely nauseous all day, slight cramping and throw up every time I eat. Is this normal after getting off of birth control? Should I wait to test again in a few days?