no periods - hypothyroidism?

Hi there. I am 30 years old and have had irregular periods ever since I was 11. I went on the pill at 16 and since then, have come off of it three times. I get my period like clockwork the following month and then never again. Three months ago I went to the doctor and got my blood tested.
-TSH came back at 5.9
-T3 was 4.6
-T4 was 13

My doctor started me on 50mg of Synthroid which brought my TSH down to levels between 1.5 and 3. It's been three months and my periods still have not returned. My questions are this:

1. Could my high TSH have been a fluke? Had I been re-tested a few weeks later, could those levels have dropped down to below 2.5 on their own?

2. After getting in the ideal TSH range, how long should it take for my periods to return?

Any answers would be appreciated, as my husband and I are trying to conceive.

Thank you in advance!

[Heather5]

I'm sorry you're having to go through all this. Unfortunately, I don't really have any experience with thyroid levels...but just wanted to wish you best of luck! Hopefully you'll get your period again soon now that your levels are being regulated!

Take care!