did i miscarry?

so first off i have always had abnormal periods because i have pcos. they range in legth from 30 - 50 day cycles but when i get my period it is usually the same really light bleeding for 7 days straight always the same. me and my boyfriend had unprotected sex using no form of birth control or pull out method all though out the month of february probably i would say everyother day at least. i wasnt concerened then though because i had started what i had thought was my period it was just light as usual. but all through out march i started falling asleep at work and my nipples just ached for no reason. usually my breasts are sore right before i get a period and it stops when i start. then about 2 weeks before i was expecting my period (it is usually around a 45 day cycle) I started bleeding really heavely which is wierd for me. i was changing a super+ tampon every hour for three days and was super clotty  then the bleeding tappered off and ended at 7 days but now 7 days after that ended i am starting to bleed again but what i would normaly expect from a period. I have also been super depressed and confused since the initial "heavy" bleeding which i initially though was a period. just wondering if you thought that i may have had a miscarrige that first week and now my real period is kicking in or should i see a doctor?