Hypothyroidism and TTC? Help!

Does anyone have experience with TTC and having hypothyroidism? Or with Infertility due to hypothyroidism? How did you find out you had hypothyroidism? What symptoms did you have? How was it treated?

I went to the doctor today and they are afraid I may have hypothyroidism. My bloodwork from last month had my TSH level at 4.3 (i guess it's supposed to be somewhere in the range of 0.3 - 3.0) so I did more bloodwork today to try and confirm it and I have a thyroid sonogram tomorrow morning.