Hypothyroidism & TTC

My husband and I are starting to try for a baby, but I have hypothyroidism and have had it since I was 11. My last test results were 3.4. My doctor was okay with this because it’s in the normal range. In my research I have seen that it should be 1-2 for when TTC. Should I push my doctor to up my meds to bring the number down to 1-2? And how should I convince him to do this since he is content with the 3.4?