Welcome to healthcare magic!
3 months amenorrhea
and a blister
like disease a clitorish with burning micturition, all these factors point towards a complex pathology.
It may be a extensive genitourinary infection
. You should get examined by a gynecologist and get detailed work up for this and you would need a good appropriate antibiotic regimen for a week or two depending opn the condition.
I hope you would get benefited with my advise.
Wish you a good health.