Difficulty breathing heart palpitations.

When i was a new born baby and had TOF i went through the surgery had it corrected followed up and i was totally fine. From last year june i am have difficulty breathing and heart palpitations i got scared and i had pain in shoulder upper back and neck which caused me to experience vertigo I took every test cbc lipid chest xray echo ecg there was nothing except mild opacites in right lung when i swallow i feel a lump in my throat and when i breath i dont feel its going in i have consulted 5 diff doctors had every rest but still cant reach a conclusion please help me they say these are the symptoms of anxiety but i am not sure please help me... Yeah i used to smoke and after a year of smoking i stopped it suddenly...like from 3-4 ciggarettes a day for one year to immediately 0. I feel difficulty breathing from mouth and my ent doct detected nasal congestion