Hey, I was on TB meningitis medication for about 2 years. I was diagnosed when i was 16-17. I am almost 20 yrs old now. During my TB treatment, I lost my regular menstruation cycle. Another doctor in the hospital advised me to take Avianne 19 . Whenever I take these medicines for 3 weeks, I get my periods the 4th week. The doctor told me to continue taking them for 2-3 months and then try stopping them. I took them for 2 months, and when i stopped them, I got my regular cycle for the following 2 months, but after that it stopped again. What is the problem with me?