Pains in my heart

Good evening doctors,may I offer my problem that I suffer in my heart,,,,,,sinse eight months I am suffering many discreat pains in my heart.also I visited many doctors for the case above,they advised me to do medical tests and I did it,the problem is that every thing is o.k but I still suffer from the same pains with cough and narrowing in breathing ،with twitter in the heart,,,,Actually I need correct diagnosis for my case