Last month I was 11 days late on my period. When I got it was a normal flow. This month I was 15 days early on my period there was no signs of cramping or bloating. On the first day I got it was heavy than I changed my tampon for the third time that same day there was barely any blood. I haven't taken birth control for over a year and half, I don't take daily meds or vitamins and me and my husband wear protection. My last pap was 2 months ago and it came back normal and my last physical was 2 months ago and nothing wrong came back on the results. Should I be concerned?