I started Levo in March, and had my dosage increased from 25 to 50 about 5 weeks ago as TSH was 1.9 but I still wasn't feeling great. Since the increase I don't feel particularly different, still pretty tired and foggy, and it's not been like when I first started taking it and had a few weeks of feeling really good before slipping back to 'normal'. I have also started grinding my teeth really badly at night and I wondered if that might be related to the increased dose, has anyone else experienced this? I think it might be contributing to the tiredness, not sure I'm sleeping well and I'm waking up with a sore jaw/headache every day. It's also disturbing my boyfriend, and he wakes me up to make me stop. I've bought a very attractive mouth guard so at least my teeth won't break but I'd like to stop it! Any thoughts welcomed.