Synthroid and fewer side effects

I was diagnoed back in november with Hashimoto Disease and had a complete thyroidectomy in December. I have been switched three times since Dec. 07 (only April 6 '08) to different doses of Synthroid. I still experienced weight gain and cannot lose weight, irritability, depression, hair loss, exhaustion... I decided last month to stop taking it all together and was wondering what effects this may have on me. Any clues as to the effects of NOT taking the medication after having a my thyroid completly removed?? I feel the same (depressed, irritable, still losing hair, exhausted...) but am sure this is probably not a good thing to not take any medication when I don't have a thyroid anymore.

Hey, First off I would like to say thank you all for posting, I was just diagnosed with hypo. I was placed on 50mg then increased to 125, I felt terrible so I cut it in half. I take the pill at night, but I still feel all the symptoms you guys feel, I woke up this morning with no voice, hoarse. My tsh level was 13, I am going back to the doctor for more blood work this week. I think I my ask to be switched to another brand. I hope all of you will soon feel better.