Strange heavy bleeding during birth control

hi everyone, I hope someone can help or at least relate. I have been on the combo pill for about 2 years. last month I took my pills all wrong i skipped most of the pack and just gave up on it towards the end. I waited to miss my period to take a test. So when the time came around to have my "period" which was during the placebo week I got a very heavy very clotty period so I just didn't test. After the placebo week I started a new pack on time. I'm now on the 5th day of the first week and have been heavily bleeding since the 2nd day of this pack. And it smells!! SO ROTTEN! I'm so confused. Did I have a miscarriage? Am I just paying for skipping most of my last month's pack? Is this random smelly heavy bleeding a cause for concern? Should I make an appointment with my doctor? I have PCOS if that makes any difference. I hope someone can at least relate or have a piece of advice. thank you, PRISCILLA