Thanks for your question on Healthcare Magic.
I can understand your concern.
Most common cause for severe
vaginal itching is
vaginal infection.
And you had
unprotected Intercourse also. This is the likely cause for your vaginal infection and itching.
Best thing is antiseptic creams. But since you can not go to pharmacy or to gynecologist, do these things.
1. Avoid moisture and perspiration in private parts.
2. Drink plenty of fluids orally and keep yourself hydrated.
3. Wear cotton undergarments only.
4. Keep proper hygiene of private parts.
5. Avoid any kind of sexual activity.
If you don't improve with all these in 1 week, better to consult gynecologist.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.