Is it thyroid or heart related symptoms?
I was recently diagnose with hypothyroidism but I feel like crap. I’m always dizzy, my left arm always hurts all the way to the shoulder and recently i feel a burning sensation on my chest and breast area. I have palpitations sometimes.I also feel like i have something stuck in my throat sometimes that is difficult for me to swallow. I’m taking pills for my thyroid problem but the symptoms don’t go away, they just worsen. Should I worry it might be something else?
You really need to go back to the doctor and report all this to him/her.

You really need to go back to the doctor and report all this to him/her.
References :
It sounds to me that you need to go back to the doctor. Your thyroid makes you gain wait in a lot of situations. Did these things worsen after your doctor put you on this new medication? If so.. you need to go back to the doctor soon. As far as I know your thyroid has nothing to do with your throat or your arm.
References :