I've changed the time of day I take my levo from first thing in the morning to last thing before bed. I'm on 125mg of T4 only. I've been experiencing hypo symptoms for quite a while and am going to pay to get my blood work done but in the meantime, I thought I'd try this change, primarily to see if I sleep any better as the lack of sleep was dreadful. I sleep better but have the most uncomfortable of headaches which has been going on for 5 days now... Do you think it's related to the change and should I revert or persevere?.... Your advice and guidance would be most appreciated..