Hypothyroidism...

Hi girls. I just recently had a physical and my doctor told me the results of my bloodwork. My thyroid level was high, at 5.8. The doctor told me she would like to see me at a 4.5, which she considers normal range. She put me on a low dose of thyroxine (less than 25mg). She wants me to come back in 3 months to get the levels retested. This seems a little conservative to me, but will try it for 3 months. I also have longer cycles (36 days) and don't know if I ovulate since I have never gotten a positive opk in 3 months. I am scared and nervous and also hopeful that this will regulate and get better. Hoping that maybe this will help me conceive moving forward since we have been trying for a few months now. I just wanted to reach out and see if anyone had a similar experience or any words of advice....