Post c section

Heather
History:
Period 2-4 days very light
Had son 2006
Iud merena till 2009 with no cycle
Had my daughter 2012 c section
Iud merena till 2014 with no cycle
Had son 2015 c section
fleshy clamps on tubes durring section
Now on no be cycle 7-9 days and VERY heavy all days!!
Is this Normal or do you think it's something I should be concerned with!!?
My last son is now 6 months old after csection I bled for upwards of 8 weeks and doc said it all looked fine and he had no concerns. 12 week check I was cleared, and everything looked good!  and I bleed so bad! Changing my tampon every 30-60 mins all 7-9 days!! 
Ideas? Thoughts??