I've tried everything peroxcide,sneezing,chewing but every time I hold my nose and try to pop it it sqeeks

Your eardrum is a thin membrane that separates the external ear from the middle ear, its function is to transmit sound from the air to the tiny hairs inside the middle ear.

The slap you received may have damaged your eardrum and should be checked out by a doctor, rupture or perforation of the eardrum can lead to hearing loss.

The sooner you get checked out the better.