What Causes Sharp Stabbing Pain In The Uterus?

all yesterday i had been having abdominal- uterus pain i dont really know where to say it was at but in that area. it was very sharp and stabbing. and went on and off. and when i was having sexual intercourse with my boyfriend, it hurt ALOT. the deeper he went, it hurt more. it was a stabbing pain. what do i do , it still hurts?