Just 5 minutes ago I felt a slight, not too sharp pain under my right boob. What could it be? I'm kinda worried! /;

Not too sharp pain. Things like this can happens for many reasons and i don't think u need to worry about iut unless it continue and the pain intensity increases , than see u physiucian.
Pain under the boob. Sharp pain under the right boob is not serious, unless it keeps coming and becomes debelitating.Just watch and if it continues, see your doctor.