Chest, constant sensation in lower rib.

I feel tightness , pain in chest sometimes throat. constant sensation in lower rib cage area. sometimes loss of conciousness. its happening from last 4 months did chest c t scan , stress ecg and ekg ultrasound, all test fine my heartbeat is in (60 - 75) and went to cardiologist they sent me home. living in delhi i had never smoked. what i feel is little air is trapped inside my lungs as it started after i came back from hill station. however i my vitamin d level was 6 three months back from then i am taking sunlight as well as medicines but no relief. i have not checked by pulmologist and i am planning to go. is there any other test i should undergo? sometimes when i feel lacking conciousness then i fear asthama. however i run daily 2 to 3 kms to shed my negativity. please advice. can gas cause throat tightness and loss of conciousness please advice...