What Causes Cough And Chest Congestion?

yes please, I have been having what I call a rolling cough that has settled in my chest...I cough at night when I am on my back or right side...but feel like something is sitting on my chest when I sleep on my left side. I never get congested in my chest, but I work with children and a lot of them have really bad allergies, and two of them have had breathing issues, I did not feel like this till after I gave one on my children a breathing treatment, at the time I was having problems with my allergies... so I figured I was just getting a cold...my ears always hurt because I have vertigo and fluid builds on them really bad, but now I have this cough that seems like it clears and when I take a deep breath it I can feel something that is on my chest...almost like weight....when I have to move around to work I get these coughing attacks and it gets to the point that I feel like I m choking for a minute because it gets stuck in my throat....but then goes back down to my chest....ive never had this happen before.