Could I be Pregnant

Hey guys. I hope this isn’t a dumb question but i’ve been worried about it for a few weeks now. I lost my virginity on March 20 unprotected and after that I got my period a week earlier than I was supposed to. It’s been almost 5 weeks since then and i’ve taken multiple pregnancy tests but they’re all negative. i’ve has symptoms but they only happen when I think about it too much. is it just in my head? I don’t want to be pregnant.