12 day period in bc!!! Why!?!?!?

My period lasted for 12 days straight. I don't know why or what I did, I'm a average 5'7 woman. I'd say I'm only a little overweight but nothing serious. Even my doctor thinks It's just because I got a big booty. Any how my husband noticed how I was being more hormonal recently and moody. Then bam, my period cam while I was still in the white pill week. ( I have normal b.c) it's been very heavy then it would disappear. On and off 12 days, no big drastic changes in body either.

We had sex last night (got me a few chips (orgasams) it was great!) Then I woke up today for my 9 am class and no period.

Wtf is happening to my body, if any ladies have ideas please help. My mom is to far away to help me.