Help should I be worried?

So I had sex about a month ago (was my virginity) and I literally fished my period that day I had sex. We used a condom and he didn’t come inside me. Last week I had quite painful cramps and I thought I was starting my period early. I had very very light bleeding and I searched it up and they said it could be implantation bleeding which freaked me out so much!!! I’m also now 2 days late for my period, but I’m normally slightly irregular anyway. Do U think I could be pregnant or just a really light period as last time it was heavier than normal??