True hashimotos disease is caused by antibodies against your thyroid. The american endocrinology association aace recommend treatment with synthroid or amour thyroid to prevent total distruction of your thyroid. This is not a temporary treatment, but a permanent one. Your thyroid could also still be completely destroyed, but the medication will slow the destruction.
The most frustrating feature of hashimoto's is that it fluctuates...Which would explain your symptoms, which are all classic. I continued to increase my dose until I got too much and then backed off. I've also heard that symptoms could be worse in the winter, so you may need more medication. Make sure you listen to your body. If you aren't feeling well, then your doctor needs to do something...Adjust your meds, etc. If they are unwilling to work with you, find another doctor.
There is a lot of info on the web about hashimoto's. Check into the american endocrinology association. If your doctor is reluctant to increase your meds, print off some helpful info and mail it to him about a week before your next appointment and then take a copy with you.
You might also check out books by mary j shomon, a patient advocate that suffers from hashimoto's.
Good luck! Kathie