Why am I feeling this in my windpipe?

[tillannook]

Okay, so I noticed for a long time now. (3-4 years) I have not been able to get a full breath at all. Then starting recently (3-4 months ago) I started to have pain in the upper interior of my windpipe. (It seemed to be coming from just below the epiglottis) Tonight it was worse than usual and I let out a cough and the pain moved. It was no longer in the same area but now it was coming from right above my epiglottis. I tried drinking some water. (At first a few sips to see if that would chase it but then I chugged a Gatorade full of water to see if that would do the trick, and it seemed too.) I then started coughing quite a bit and I got some thin, white fluid that came up from my lungs. I then noticed that my breathing was so much better. It's felt like half of my windpipe was just blocked or something but I know it wasn't a foreign object. (Because I haven't ever choked in my life or anything like that and i'm pretty sure I would've noticed that when it happened.) Now, to my current struggle. Now that I was able to do... whatever I did with that cough, that area feels very raw and almost cold when I breathe in (but not when I breathe out) and it's exponentially colder than anywhere else in my windpipe (when I breathe in.) I do not feel anything in my esophagus. (Don't know if that's important or not.) But sometimes i'm feeling a kind of, trickling feeling on that side of my windpipe; yet my breathe capacity or anything isn't affected. (So I don't think that i'm bleeding into my lungs or anything and plus I would feel pain from that, right? I can isolate the feeling that if I start with my thumb and index finger on my larynx and move them directly sideways away from eachother but staying on my windpipe, when I push back a little bit (by where my veins are next to my neck) I have two hard bumps. (One on each side) and the pain/new cold feeling was/is coming from the right bump on my windpipe. I'm kind of scared to fall asleep and stuff due to not wanting my lungs to fill with fluid or anything... I don't know what to do. Any advice? This is all the information that I have but I can answer any questions if needed.