I'm 28 years, married six months before. How long thyronorm 25 can be taken if my tsh level is normal (3.9). For past 3 months I'm had 1.5 days period. In my first report tsh level was 9.57 then I took thyronorm 50 then the next month tsh was 0.28 then I stopped medicine and after one month my tsh level was 3.95. For last five days I'm taking thyronorm 25. After being all dis medicine I'm still getting 1.5 days periods only. No changes after medication also. Pls suggest me that I have thyroid problem or not. If yes then after taking medicines tsh level is normal I have scanty periods.