THROAT SUFFOCATION/CHEST TIGHTNESS/WEAKNESS/DIZINESS

I’ve been feeling like I’m being chocked and having trouble breathing from my upper airway specifically my throat for 9 weeks now. It’s all day constantly. I basically feel like I’m being asphyxiated and when they check my throat it’s fine and no infection. They ruled out anything emergent at the ER. What can I possibly have? I can’t eat or drink because it’s hard to swallow. I have a heavy chest tightness and pressure with this and a great amount of weakness in arms. I’ve been having dizziness all day along with this. 

Btw: anxiety has been ruled out. I have actually choked on my food multiple times already and can’t walk without assistance because of the dizziness. I lay in bed all day. My face is very pale. 

Do you get palpitations?