Pregnant

Hey guys I’m 16, and um I made some bad choices on my part, I recently had sex with my boyfriend four times, all with the pull out method. I’m not on birth control because of health reason, I have to switch medications so they don’t interact. Anyways, My periods are 7 days and the cycle is 27-28, it may vary. But it’s 9 days late as of today, I’m constantly worrying if i’m pregnant, because one of the times my boyfriend was unsure if he “cummeddd” in me. I’m scared at this point, two weeks ago I took a clear blue pregnancy test, negative, took one when my period was 3 days late, negative. I’ve been stressing about it so all and all it could just be me stressing too much. But I have had symptoms of Sore breasts, my body temperature has increased significantly, I’m always sweating. Cramps but not like my period cramps. Headaches, I got a runny nose too. Nauseous all of the time in the morning. Oh and the smell of certain things makes me barf in my mouth. I’m actually scared guys. Also forgot to mention my periods are always regular, Ive had it for 6 years now. What should I do?