Finally got my period..

After a 93 day cycle I finally got my period yesterday. It's been the heaviest period I've had ever, changing my super tampons every two hours, and last night I got a total of 2-3 hours because of the cramps. (Midol isn't helping much) Should I be worried about this much blood though? I mean my body may be making up for the two missed periods, but it's a lot.
 Also, I don't think it's a miscarriage because before recently (the past week) I hadn't had sex and when we did other stuff we made sure there was no way I could get pregnant.