Hi Me And My Girlfriend Always Having A Protected Sex.

Hi me and my girlfriend always having a protected sex. Im always using a condom and even im using a condom i always cum outside and always checking the condom if is it broken or not.last thu. We have sex and last mon but after we have sex last monday when she's peeing there's a blood on his underwear and tonight she has a red discharge.what do u think the cause of it? and her due date is alway last week of the month.im just worried.