I'm late but not pregnant

Takiya • Hey guys I'm Takiya! I love sports and being active! I love my boyfriend ❤️. I love to cook and help with relationships.
Hey ladies, so like a week ago my boyfriend asked me if I got my period and I said no. He started to worry that maybe I was pregnant because we haven't been using condoms for  a couple of days because I hadnt been to the store. So on Friday I went to the store and picked up a pregnancy test. The results came out negative and I wanted to make sure so at the end of Friday I took a second one. The results were the same and I took the last after I had sex with my boyfriend today and I still got a negative result but I haven't had my period all month... Should I be worried? Any comments or suggestions or anything would be greatly appreciated!! Thanks girls :)