Respiratory Problems. Don't know why?

Since last 5 months I've been facing a lot of problems related to respiration. 3 to 4 years back in past, I felt little problem related to taking breath and I ignored that as it was just because of anxiety problems. Now since last 4-5 months I've been very sick of many other problems related to respiratory system. Now I feel difficulties in breathing. I've gone through medical treatment twice in IMS BHU ,Varanasi and still in problems. Doctor said it's just because of Asthmatic problems and suggested me to take 4 puffs of Inhaler regularly. I did but it doesn't work at all. They also treated me as anxiety patient but though it didn't cure me.I've regular cough and phlegm for 3 months and problem in breathe too. I'm sleeping a lot don't know why ? Cold hurts me a lot but I think now summer too (thought it would be just because of Asthma).Can't work a lot (gasping prob),can't run for even 100ms , loud causes pressure inside chest,Non- smoker and non-alcoholic. Mucous prob in throat.