 [ Symptoms ] i had unprotected sex the day i was supposed to start my period now i am 4 days late could i be pregnant  my husband and i had unprotected sex and during it i started what we thought was my period and respectively so it was on time so he ejaculated inside of me once in the light we realized it was just a brownish discharge not exactly my period and that was it i did not discharge again and i also never started my period now i am 4 ish days late could i be pregnant [ Disease ] staph like a skin infection is technically contagious but a urinary tract infection caused by staph is not contagious you cannot spread it to someone else i assume you are being treated so a urinalysis or culture after treatment would provide you with the proof of cure assurance