Levoxyl and constant headaches

I have been on Levoxyl 125 mcg for about two months after my thyroid was "killed" with the radioactive pill. Ever since I have been on this medication, I have constant headaches and feel sick on my stomach all the time. I had to go to the ER the past week because of the intense vomiting. The doctors tell me it's not related to my thyroid or the medication. How can this be? I didn't feel this bad when I was hyperactive thyroid. My wife has had to take care of our 18 month old all by herself ever since I have been taking this medicine. I feel like I am missing out on my life! This is terrible!!

I am a 38 year old women who is diagnosed with Hypothroid. I was on Levoxyl for a couple weeks and got changed to Armour and was feeling pretty great more like myself. I got switched to Levoxyl again when I found out I was pregnent. I had constant headaches, rashes on neck, loss of concentration, muscle aches and heart palipatations.
I also have depression. I ended up loosing the baby and have some bad days most of the time. My emotions are all over the map.
I am switching my doctor so I am hoping that I can be put on armour again to start feeling like myself.