Difficulty in breathing. Medications.

Since last 1.5 years , i have been suffering from shortness of breath or if exactly speaking difficulty in breathing fully .when i consulted a physician last year , he examined me by my chest x-ray and given me medications for high bp ,anxiety ,lung infection & some digestive medications . because he told me basically the shortness of breathing is due to high bp ,then after following his medications i felt better but again after few months of his medications , symptoms got back and i got a constant urge to breath and started yawning most of the time and now since last few months i yawn most of the time & now i feel that i inhale through my nose 70% and 30% through mouth twice every minute to satisfy my urge for complete breath rest i inhale and exhale through my nose and now days i feel a little heavy head throughout the day. one more important thing is that at night while sleeping i feel that my nasal passage is more than partially blocked .i dont think this is due to high bp .