Last summer I was diagnosed with hypothyroidism. My doctor uses the revised range of 0.5-3.0 as being the normal range and I presented with a 4.1 TSH level. I was started on 50mcg of synthroid and rechecked in November. My level was 3.9 so she increased the dosage to 75mcg.
I have two doctors that I currently see to treat my PCOS. I had pending blood lab sheets for both, one for the end of January and one for my endocrinologist for the beginning of March. Long story short, I got them confused and did the March one in January. I went in on the 26th of Jan, and my TSH was 1.2. I was kind of surprised at this number because I really didn't feel any better or different than before. On February 6th, I had my labs for my primary physician drawn and my TSH level was 4.8. My doctor is puzzled by this and says she really can't explain why there was such a drastic change in my TSH level in a week's time. The only possible explanation she had to offer was that I may have Hashimoto's thyroiditis. Are there any other possible explanations for a change like that in such a short time, or has anyone ever experienced that?