feel heavy in the left side of the neck running into the chest...what could this be?

I’ve felt there is something stuck in my throat for quite sometime now n it drives me crazy i feel as though im swallowing something yet i don’t and i feel as though something is still there. Now i feel as though i feel it kinda running down to my left side of the chest…i don’t get it…what could this be?? It sparks my anxiety to an ultimate high:( n yes I’ve gone to see a Dr…they say nothing :frowning: