Help??

So I just got off of my period today but Sunday I put my patch on (birth control) and also had sex that night. When I woke up Monday morning I felt so sick and threw up. This happened to me a month or 2 ago. But I never actually threw up I just felt nauseous until I went to sleep and then I was fine. It’s always when I wake up at 7. I took a test when this happened last time and it was negative. Any ideas??