Postpartum bleeding smells bad

18F around 60KG , started vaping again a few days ago but was on nicotine replacement.
Please don’t judge me for my age and the fact I’m postpartum but I gave birth at 28 weeks 12 days ago (please don’t ask)
I’m not sure if the fact I was only 28 weeks means that I’m not supposed to bleed as much or anything but I’m still bleeding moderately however today I’ve noticed it smells really really bad, before it just smelt like normal blood but now it actually makes me gag if I smell it, the closest thing I can describe it to is literal cat litter, or some kind of sewage, should I be worried because my midwife said to watch out for fowl smelling discharge but this isn’t discharge it’s blood.