Levothyroxine Sodium and mood swings

I have been taking levothyroxine for about 10 years now, i have had the following symptoms with them, weight gain, hair loss, mood swings etc, but i can also put it down to having a Mirena coil. The main thing that has concerned me is that i started to have panic attacks over a year ago with severe depression to go with it, my life was fine before that, had no problems, 3 wonderful children, my life was great.
Does anyone know of any other medication/natural products we can take?
I'm just so fed up with feeling like crap all the time.

Started taking Levothyroxine 100 3 weeks ago, for last week I'm in agony, my joints and muscles are sore, specially legs and arms, got constant headaches, mood swings, I'm also short of breath which developed before muscle pains, went to the doctor, was told it's probably asthma (!!) got tablets and inhalator and he mentioned anxiety, when muscle pains started, went back, was told that it's not related with hypothyroidism or Levothyroxine, it's a virus (??) have to drink plenty of water and got Diazepam and link to anxiety website. Help, it's not stress related! I don't know what to do!! Does anyone know how to get rid of those pains?