Hi, my period started yesterday but it stopped in the evening. i had a phone sex yesterday night. i am worried.

No worry: Period may sometimes be short - if doubt ok to check pregnancy . But if you had phone sex - no way to be pregnant. If you been sexually active ( vaginal intercourse) in past weeks than check it. Arousal stimulate oxytocin production and it may possibly alter your ongoing period .keep good healthy life style - and keep track of your periods - check pregnancy if any doubt.