Bleeding a River

Heather
I have no clue what is going on with my period right now some background information; a couple of months ago I did not have my period, me and my husband though I was pregnant but was not. Then everything seemed back to normal except for the worse cramps of my life after the month of no period.  this month I have been spotting for a week, now my peiord has come and i have been bleeding more than normal. I know my blood flow, first and second day is heavy (I use super tampons), the third-fifth day is an average flow (use  regular tampons). This period I have went though three supper tampons in only two hours (this is not normal for me at all). I feel like I am bleeding out a river! Should I go to the doctor or is this normal?