I had sex like a week ago or a little longer and the condom didnt break at all and my boyfriend cummed after we had sex. Then on saturday we did oral and all that stuff not actually sex and now im 3 days late. I read that since i had sex and did oral i should be late and i shouldnt worry. Am i most likely okay? Im also sick right now with either strep or something like that could that cause my period to be late too? Help!