If the pain is for a few mts then you should not worry
If it persistent there may infection
If the discharge is foul smelling it is infection
There are two choices
First consult gynecologist to examine and confirm
Or
You may take following
Rx
Tab zanocin oz twice daily
Candid cl vaginal suppository for insertion in vagina
Next Steps
you may consult online if needed
Health Tips
minorproblem , need not to worry