I Need Help Please As Soon As Possible!

Patient: So one month i got my period really heavy thab when i got off of my period i got on the birthcontrol nuvaring i had protected sex on it once and than took it out cause of allergic reactions i only lasted two days with it on then i started bleeding with brown discharge a week past and the bleeding stoped but i sometimes still have the brown discharge and my stomach hurts i noticed the blood smelled nasty

Symptoms: Brown discharge bleeding smells bad and stomach pain