Period twice this month

I've had my period twice in Nov. I started my second on saturday (Nov. 22nd) and it hadn't even been two weeks since my last. I missed some BC so could that be why? I'm more annoyed that anything bc this period is super heavy and I can't even wear a tampon, so I feel like I'm wearing a diaper. Lol. I know I wasn't pregnant so I cant be miscarrying, wanted to throw that out there before anyone suggested it.