On 4/1/13 had pain cyst rupture. I have pcos and don't get periods. Spotting 2 days after cyst and now bleeding a lot. Could this be cyst?

Cyst Rupture. It is likely that you did have a cyst that ruptured or you ovulated. If you have irregular cycles, then the drop in hormone level could have been enough to cause the bleeding. If it doesn't taper off over the next several days, i would see your physician to evaluate you.