Breathing trouble. D3- 15 pls suggest!

I experience throat irritation and pain frequently from past 6 months. Pain in uneventful and suddenly starts and stops. And also from last 3 months I started experiencing breathing trouble. I feel urge to take deep breaths frequently. Although I am able to have sound sleep or exercise daily activities along with 1 hour walks without too much difficulty.but while walking also I continue taking deep breaths. Also sometimes I feel little feverish with headache but when I check for body temperature it is normal.this condition mainly occurs in the evening. Sometimes I also feel dizziness, tiredness and nausea in the morning after getting up. My very recent blood reports readings; CBC - normal CRP- 2.18 IGe- 724 D3- 15 Pls suggest