Someone help me plz


I had sex with my boyfriend on the 18 and while we was doing it I felt like I was going to throw up it stop when we stop having sex but I been dealing with pain since nov 10 when we had sex next day I had stromch pain my boobs and my back was hurting I been tired a lot. I don’t get a period till the 3rd of December I took a test 4 days ago and it was negative.