I've been on Levoxyl (.05) for 7 months now. I feel very anxious...

I've been on Levoxyl (.05) for 7 months now. I feel very anxious on the inside - sometimes like i'm going to explode. Since I've been on this drug, i've also experienced a full-head feeling (sometimes turning to bad headaches) - i worry & stress more - weight gain - achy joints etc. I'm afraid to stop taking it because of my thyroid. Sometimes i just feel "flat" - not interested in doing anything. I've never experienced this "down" feeling in my life - never had a problem with it (until on this drug). Recently my doctor has put me on an anti-depressant (5 mg) - i am trying it - so far, i feel the same, only more anxious and eating less - i know this isn't an aide to my problem. Maybe this drug works for others (as everyone's different), but i feel stuck between a rock & a hard place in my case. I relate to alot of the other emails. Hope there is a solution.