Levoxyl and total hysterectomy

I am extremely hot and sweaty, memory loss, fatigue, aching hands, dizzy at times and most recently had a fainting spell (black out) while I was attending a movie -- it started with dizziness and then I became totally burning up hot and wet with sweat so much so that my hair was wet -- this lasted about 1/2 hour and ended with the dry heaves. Please let me know if anyone has experienced this. I had my thyroid blasted with radioactive iodine about 3 years ago (Graves Disease) and I have been hotter than blazes since that time. I am on 112mcg of levoxyl