I have been on Levoxyl for 3 years, changed from Synthroid. I hav...

I have been on Levoxyl for 3 years, changed from Synthroid. I have gained about 20lbs a year for the last 3 years, suffered headaches, stomach problems, dizziness and nausea. The last couple of months I have had migraines or bad headache more often, just about every day I feel bad. I stopped the Levoxyl and changed Dr's. new doctor said, stay on meds, changing back to Synthroid, but until meds are delivered I should stay on Levoxyl, I took a 1/2 dose yesterday and again today, I had a bad headache this morning, once again. I will not take Levoxyl anymore, I will wait for the Synthroid to come instead.