I got my period, but could I still be pregnant?

Ivy

So I had sex back in August while on my period where my partner finished inside me. I got my period in September, he pulled out a few days before my period. Both months my periods were normal in length but this time around I don’t have the usual symptom of leg pain which is usually THE sign I’m about to get my period. I don’t have any other symptoms but I’m terrified to test. Someone please ease my mind!