Hi everyone, just a quick question, I have started taking T3 as well as T4 because I appear to have conversion problems. My T3 when just on 100mcu Levo was 3.2 (3.6-6.5) and T4 in top of range. TSH low at 0.02. So my endo started me on T3 - 20mg in 2 doses and dropped Levo to 50mcu. I have been taking this combo since 7th Nov and feel much better in many ways, brain fog etc but I have noticed that I seem to have less energy again like when I was first diagnosed. Its not drastic but when I play tennis I get out of breath very easily and my coach has noticed this and he says he thinks I had more stamina when I was just on T4 and certainly didn't get out of breath as quickly. I have rang the docs and they are doing me a blood test form for TSH,T4 and T3 and depending on the results perhaps I can bring forward my review with my endo which is March! Anyway, I am pretty much certain I am not hyper at all, no palps, sweating, anxiety etc and I still need 2 laxatives every day! Could the breathlessness when exercising be due to still being under medicated? Just wondered if anyone had any experience of this?