I had the same.. and i was 100% fine and healing and no issues but i kept saying to drs and midwives ‘i feel like i smell like a dead sheep’ (im a farmer so thats my humour) but i was completely fine!
Lochia is more intense than a normal period. Post partum is a whole new smell as it is
Perhaps it is the bleeding! I also had my baby 3 weeks ago and have a 3rd degree tear, recovery is hard :-( hope you are ok xx