hi, im having problems breathing. i have to yawn so long in order to get a full breath. i keep thinking im going to die, like everyday i feel like im going to die. its to the point to where im just accepting the fact that i will pass on, but im only 20 years old. i dont know why i feel like this, but then i start thinking i might have a tumor because of headaches and when my throat hurts, that i have throat cancer and my lymphnodes are swollen so i probably have HIV and then im going to die. i dont know what to do.