Suggest Treatment For Side Effects Of Synthroid

I am having difficulty with my synthroid dose. Presently my dose is 88mcg (0.088mg). I am experiencing heart palpitations, also known as a rapid heartbeat, loose stools and have had several panic attacks. Please know that I have been having issues with my synthroid for quite sometime. My dose was decreased for a bit and I was having severe panic attacks, pounding heart, accelerated heart rate, sweating, shortness of breath chest discomfort and I ended up heading to the emergency room several times thinking I was having a heart attack. I have blood drawn two times a year to see what my levels indicate. Please know I do not take the generic form of thyroid medicine, I take Synthroid and have been taking for a very long time, actually since 1976. I am almost 64 yrs of age and at age 23 I had thyroid cancer. My thyroid has been removed and I have been cancer free for a very long time. I have been extremely fortunate for so many years, but these last two or so years, I have been having issues. Synthroid is the only prescription drug I take. I exercise each day and I try extremely hard to take good care of myself. When I visited my endrocrinologist this January, tests revealed that my level was a bit high, but I advised my doctor that I wanted to remain at the same dose 0.888 mg for fear of going back to the panic attacks that I had experienced on the lower dose and I was so fearful of that. When I visited my endrocrinologist this July, he reported that my levels were perfect. Well, it is now September and I am having issues with too high of a dose. I am so curious to know if my level will ever be perfect again. Thank you for reading this. Sincerely, Roxanne M. Beal