Am Hypothyroidism Patient. On Levothyroxine. Had Chest Pains. Increased The Dose. Now Feel Some Sensations In Throat. Treatment?

Hello. I was am a hypothyroidism patient and I was taking Levothyroxine for about 7 years with my dosages going up and down but mostly up. Well, about a month and a half ago, I had to see the ER Doctor because I was having chest pains..caused by my recent (higher) dosage prescribed by doctor. I was on 75mcg of Levothyroxine and my doctor increased my dosage to 100mcg. After about 13 days I started having the chest pain like mentioned and went to the Emergency Room. I told the doctor about my chest pain, about the new dosage raise and about in time past that another doctor tried to raise my prescription to 100mcg and it done the same thing...gave me bad chest pain. I told the ER Doctor I was tired of the Levothyroxine cause it would only work for 2-3 months and would begin to stop working and when other doctors would raise me up to the 100mcg mark it would cause my chest to hurt. So, I asked if he would prescribe me Armour Thyroid to see if it would be better. So the ER doctor prescribed it for me with a dosage of 60mg equal to the 100mcg in Levothyroxine. After only maybe 5-6 days of taking Armour Thyroid 60mg I started having this funny sensations in my throat around abouts where my thyroid would be. It's a feeling of like there is something in my throat or something and sometimes I get twinges of pain. I went back to my family doctor and his nurse saw me and she felt of my throat to see if my throat had any swelling...which she said she couldn't feel any swelling. And she thought it could be allergies causing my throat to feel like this...but after those several days taking the Armour, my throat has been feeling like this. I just don't know what to do or what's going on. I am really scared over it. There are times my throat feels worse than other times..but most of the time it's a constant feeling of "something there". Is this the Armour Thyroid medication causing this??? I breathe okay but this funny feeling in my throat scares me because I get afraid of that my throat will close off. It scares me so bad sometimes that it gives me a panic attack. Please Help! I'm so scared!