Am I pregnant? I’m 16.

Okay here’s my story. I’m totally in love with my boyfriend, so that’s not the issue. But I am on the pill, and during my placebo/period week we had completely unprotected sex several times. I’m nervous that I’m pregnant because not only did I have unprotected sex during the week where I don’t take my pill, but I am showing literally every little sign of pregnancy. My next period is supposed to be in 10 days from now, 3/11. I took a cheap pregnancy test today and it was negative, but it’s obviously too early to tell. I have 4 other pregnancy tests and I’m going to take them periodically. Anyways, what do you guys think? Could I be pregnant? Please please please help.