My Husband been has been having left chest pain for the last few months. He went to the hospital in May and they told him he was not having a heart attack and to follow up with this doctor. He did not check with his doctor. The pain has continued and about a week ago he had a calcium test at a heart hospital and they did even recommended anything because his level was 0. Today he came home from work with the same complaints and he thinks it is a heart attack but he only has the left chest pain. He has been paid heart burn meds for 10 days and still the pain continues. I think he is have a stress attack or anxiety but he doesn't agree. Is it possible to have a blood clot and how would you even tell.