How Should Amenorrhea Be Treated?

Hi doctor,
I am a 26 yrs old woman married for past 8 months. last November i experienced delay in my periods by 2 weeks from the reguler date, post which i havent had my periods at all.That is 3 months without periods now.
I did Pregnancy test using home pregnancy test kit 3 times during these 3 months. The result for pregnancy test was negative.

I dont have any know ilnesses or any health issues.
Please address this problem and recommend any medication which can be purchased in India and if possible provide me your contact number so that i can call and explain my problem again.