I have Hashimoto's and have been on 50 mg of levothyroxine. I found out I was pregnant last week (approx 5 weeks) so I informed my doctor and asked to have a blood test done. I rang the surgery to find out the result and was told my TSH level was 3.5. I have read in places that this is considered high and my dose needs to be increased. However, the doctor has put that this is OK and no action is required. I have arranged for another appointment to ask to be reffered to a specialist and in the meantime I was thinking to increase my dose to 100mg. Is this advisable or should I wait? I have already had a miscarriage at 11 weeks and that is when I was told I had a high level of thyroid antibodies (370 IU/ml).