Worried about pregnancy(UPDATE)

Okay so my boyfriend and I tend to have a lot of sex when he’s home from college, which is every few weeks. We tend to be safe and use condoms, although a few times we’ve gone without. And my period has always been on and off because of how thin I am, and I didn’t get my period last month but i did a little spotting. Anyways last week I took a test which came back negative and I’m supposed to have my period in a few days but I’m super worried. Anyone’s thoughts??I TOOK ANOTHER GEST WHICH WAS NEGATIVE