I just need reassurance!!

Before y'all think I'm insane, please know I have bad anxiety and JUST need reassurance. 
I haven't had sex since January, he used protection and pulled out before doing his thang. I have had a heavy period every month since then with regular PMS symptoms. I took a pregnancy test a few months ago to ease my nerves and it was negative. BUT I AM CRAZY AND IM STILL FREAKING OUT THAT IM PREGNANT. (I'm not going to have sex anymore btw) please be kind and just help your anxious girl out