After seeing Dr Skinner I started on 25mcg of Levo on 7th August, and have been fine. I take it at bedtime and had to double my dose last night to 50mcg and am wondering if it's too much for me. I went straight to sleep but then woke at 1am (I assume when it kicked in). I had a bit of a headache and felt woozy, and had a ringing echo-y feeling in my ear, also I just could not get back to sleep. I am OK this morning but I'm not looking forward to going through all that again tonight. Any advice please?