Hypothyroidism and TTC

I was diagnosed with hypothyroidism when I was about 14/15. I never took my medication like I was supposed to because I didn't realize how serious the condition is. I'm now almost 22, My boyfriend and I have been TTC for over 2 years now and we've been looking into it and I got my thyroid level checked for the first time in 2 years. In 2017 it was at 2.9. As of May 6 it was 5.76. I started on 50mcg of Euthyrox and my doctor said to take it for 8 weeks then have my level checked again. I was wondering if anyone has had similar experiences and how long it takes for TSH to go down? I've been on my Euthyrox for just over a month and I go back at the end of the month for bloodwork