hiii. im 16 and ive been with girls my entire life. howeveer a couple of weeks ago i had a threesome with another guy and he put his penis inside me and now im hhaving stomach problems. is this normal
you might have some sort of infection
If he wasn't wearing a condom and ejaculated inside your vagina then you could be pregnant.
Take a pregnancy test and either stick with girls or use a condom next time.
Practice Safe Sex.