Hello, Thanks for sharing your health concern with us. I have gone through your query and would like to offer you some suggestions. This post coital bleeding can more likely be due to a local cause like an infection in the cervix and/or vagina, erosion of the cervix, polyps of the cervix or endometrium and urinary tract infection. Use of oral contraceptives is less likely to cause such a symptom though coagulation defects are a possible adverse effect. Please get a proper clinical evaluation to detect the cause and plan further management. Hope this helps.