Synthroid and freak

Diagnosed hyperthyroid about 3 yrs ago. So extreme they deemed it necessary to not mess around with supression therapy and gave me radioactive iodine. Was all done so fast I didn't have time to think if I was doing what was best. Anyway.....1 mg of synthroid. When I am on it hair loss, thinner nails, calf cramps that kill, anxiety and depression...because of the depression I don't take care of myself therefore I don't take my meds. ta da...i feel better when I don't and all the other symptoms go away too. After a few months I freak myself out that I dont have a functioning thyroid and need to take my meds. So I restart the synthroid and bam....here the bad things all start again. And the cycle goes round and round.