Hi, I Have Hard Time Breathing, Can Not Take Full

Hi, I have hard time breathing, can not take full breaths, at the same time my nose gets stuffy, I feel like this constantly, maybe 1 out of 10 breaths I take is a full enjoyable breath. I force myself to burp (like right now), I don't know why, sometimes I feel tightness in my throat and feel like its hard to swallow, I feel that way right now, sometimes I feel lightheaded, my heart starts beating fast. My breathing gets worst when I lie down and I start to panic and get scared like I am going to stop breathing and die.