Could I be pregnant?? Someone please help😕😪😔

Ok so me and my partner had unprotected sex twice after my period on April 3rd & before my next period which was May 1st . So May 1st came , I didn't get my period . The next day came and I still didn't get it , I didn't start bleeding til 6 days after my period was due. On that Thursday , when I started bleeding , it started off as light then it got heavier and heavier , I've been bleeding for 5 days now. I thought this was my period but it's not. My period lasts only 3 days & it only comes every first Friday every month, my period has never been late. I have not been stressing. But I have pregnancy symptoms. Could I be pregnant? Can someone tell me what this bleeding is?, what should I do??