I've been taking 50mcg/day levothyroxine for a few weeks now and am wondering when I'm supposed to start feeling better. My hair stopped falling out right away, but the horrible fatigue isn't getting any better. It actually might be getting worse!

I took an extra half dose last night as I transitioned from taking it at night to taking it in the morning, and today might have been the first day I wasn't completely asleep all day. How long should I wait to see an improvement? Or is it possible my dosage is too low?