Hi, Thank you for choosing Healthcaremagic. Yes you can become pregnant with UNPROTECTED INTERCOURSE, regarding bleeding during intercourse could be due to problem related to CERVIX, what I advise you is get a PAP smear examination and urine pregnancy test. I also advise you to get evaluated for Irregular periods. Please ask if you have more questions. If you are satisfied, please make sure that your ACCEPT my answer so that I receive credit. Good luck!!