Needing some advice

Bailey
Ok so I'm new to this, this is my first post so bare with me. So my new boyfriend and I started having sex (lots and lots and lots of sex) about a month ago. I am allergic to a hormone in birth control so I cant take it. But he's pretty thick so we like to start without a condom then put one on halfway through. He has a lot of Pre-cum, and one time we didn't put on a condom and he started to cum in me then pulled out, but some still got in me. Ever since then we have been more careful but still like to start without a condom. Now my breasts are super sore, I'm emotional and I've been eating more, and weird foods. I took a pregnancy test yesterday and it came up negative, but I'm not convinced. I'm supposed to start my period any day now. Any thoughts/advice?