Medical question: feeling in the back of my throat?

I've been feeling it for a while, and it's not pain or mucus or anything. It's in the back of my throat and it's almost constant, and it feels like I need to breath in deeper, but when i do it doesn't help. Sometimes swallowing (nothing, just going through the motions) and then pushing with those muscles (? make any sense?) helps a little. I always feel like I'm not breathing deep enough, but I breath normally.

Has anyone experienced this? Does anyone know what it is?
Medical question: feeling in the back of my throat?
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