welcome to HCM,
as per the details u have submitted,
bleeding form the anus has no relation with birth control coil..as u have already got the problem proctitis
..may be it has flared up, that why u have above mentioned symptoms..
as it seems , you are not definetly confirmed by a gastro enterologist , that you have either proctitis or colitis, i advise you to first consult a GASTROENTEROLOGIST
and get done COLONOSCOPY
the possibilities are
1. INFLAMMATORY BOWEL DISEASE?
2. ANAL FISSURE
3.NON SPECIFIC PROCTITIS..