rash inside vagina

okay...i had unprotected/protected sex
about 3 days later i get my period
towards the end of my period i started feeling burning when i pee on the right side
when i checked i seem to have a slight rash on the right side ,inside the second lips(dont know what they're called)
when i scratched it ,it helped didnt make it worse but just soothe it a little
but i just dont know what it is or whats the cause
i think its my tampons cuz ive had it before after my period.so any ideas what could it be i mean ive had for about 2/3 days n i hasnt gotten worse its just still there

[gracefromHHP]

You need to go and be seen today to find out what is going on. they need to test you for yeast and bacterial infections vaginally and if they feel your rash might be due to herpes, they'll do a lesion culture and typing.

grace