Breathing Issues & Excessive Sweating.

Sir, I have been facing few issues from past 6 months. I have been sweating alot when indulge in any activity, I can't stay with air conditioner. Facing breathing issues even if I do minor work which includes lifting 5kg and above. Walking for short distance makes me breathless and sweating starts. No pain in the body but at time my legs gets tremors and I get restless. Dizziness during the morning and night. Due to chronic sinus my nostrils gets blocked and due to this I have been using Otrivin Nasal spray and I got addicted to it. I have quitted smoking 6 months back and never consumed Alcohol. Sometimes I consume Codeine syrup which gives me relief from sinus irritation. At times weird sounds comes up when I breath in the night. Extreme restlessness and trepidation usually when I come home from work.