Heavy periods?

Emily
My baby is 3 months and I'm on my second period since she was born.  My period is heavier than I've ever had! I went through a tampon and ruined my clothes and it was only in 4 hours :/ it also seems to be really watery because the pads aren't containing it well ether.  I don't know what to do! Could this still be baby stuff draining out with my period?!