punani wildin sos

soooo ... about a week ago i got off my period and the next day i had sex , ever since i’ve had grey/ brown ¿discharge¿ and v v bad vaginal itching (not like crabs) . one day i was pulling small strips of skin out of my vagina..

i don’t really know what to do... yikes

everything that i google says scary stuff and idek what to think , this has never happened before.

please someone help.