Hello doctor, My friend is 21 years old and we had oral sex on 23 June 2018. Her previous period date was 02-08 June 2018 and till today i.e. 09 July 2018 she didn't have period. It's getting delayed and even she is not sensing any signs of periods in the coming days. We didn't indulge in sex. I wasn't wearing condom for quite a time while rubbing her vagina. My only fear is cum (maybe precum) might or might not have touched the fingers and fingering might have made precum in contact with vagina. We are highly tensed right now because the periods didn't come yet. I lot of things are going in our minds making it worse. Please advise us what to do? Do she need to eat something for the periods.