Hiya. So Ive been on 50mg levo for a while as my TSH was around 5.5 I think and I just recently been tested again and my level is at 3.7. She said to continue on the 50mg. I been having tummy troubles with anything higher. Also my TPOantibodies came back at 300 high. Does this mean that my thyroid problem is caused by immune system Hashimotos or not? I dont know alot about how to tell. My mum has a thyroid prob but not sure if hers is Hashis or not. Am I on the right track with my meds do you think. I think my free thyroxine was 14. any advice for me would be greatly appreciated. I not noticed alot of difference in how I feel yet but it may take time. x oh yeah im in uk so it would be uk ranges i fink.