High TSH (thyroid) levels


I recently had infertility testing. One of my tests were to check my TSH levels. My level was 2.5. My doctor said that it was in the high range of normal but he didn’t feel it was high enough to prescribe medicine. I’ve been reading a 2.5 level or higher is linked to difficulties getting pregnant. Has anyone had similar levels or higher and your doctor prescribed you medicine or have any experience with this?