Hi, I Have Had A Tubal Ligation March 1st When

Hi, I have had a tubal ligation March 1st when my 4th baby was born. I usually bleed for up to 2-3 weeks after giving birth this time it was different.. I've been bleeding since than and we are in April now still bleeding but my blood is now brown like a dark brown but no bad odor is this normal? When will it stop and I can go back to my regular periods