Unless a physical examination and investigation is done it's hard to determine if you are suffering from any
std. kindly do not shave the sensitive area of your vagina that in itself could be giving raise to an allergic reaction. Just trim yr pubic hair with a pair of scissors. Many STDs are asymptotic hence I would advice you to consult a lady doctor in person and have yourself checked.
Next Steps
Consult a competent lady doctor personally
Health Tips
Do not have sex until it is determined what is causing your discharge and rashes.