Help?!

Recently my boyfriend and I have begun to have unprotected sex. We’ve been together for 7 years so I trust him, we use the “pull out method” and I’m nervous it might not work. I’ve always had a stupid period meaning I’ll go months before I get it at times for example I hadn’t had my period from January to the end of April but I wasn’t pregnant or anything. Him and I had unprotected sex for the first time on the 11th of June and I can’t remember if I had my period in May so I don’t know if I’m late because my period or because I might be pregnant. I’ve taken 3 at home pregnancy tests and they all came back negative. I don’t know what to do. 🤦🏽‍♀️Help please