Diagnosis: Hyperthyroidism..It's killing me

Hi,
I am new here. One year ago I was a productive member of society. I went to the Dr because I felt awful. I sweat the minute I exert or get off the couch to do anything. I have chest pains, fatigue and oh so tired, just incredibly tired. My GP did the entire Thyroid thing and it was discovered I have Multi Nodules and have had a FNA so no cancer. I have a feeling of a huge lump in my throat which causes me to constantly burp. I bend my neck and I start coughing and choking. My heart races when I sweat and sometimes I can barely make it to the couch before I fall asleep. I sleep eight-nine hours and feel like I have not slept a wink. My TSH is .034 but my T3 and T4 is normal towards the high end. I have been to two very qualified Endocrinologists and both say these symptoms are nothing to do with the Hyperthyroid or to the 2.3cm large nodule with several smaller nodules. I am so tired of living this way and am having to give up my business because of extreme fatigue and the incredible sweating and tiredness. I go in and out of depression with this. I have one good normal day and four crappy days. If this is not part of Hyperthyroidism then what is it. Someone please help me because these Dr's think I am a hypochondriac. Never mind that I have not seen a Dr. in 20 years outside of normal checkups.

Sandi S.