I ve had chest pains 2 times in last year. I went to ER for both of them. The pain was where the heart is and for one of them I could not feel left side of my body. They did bloodwork, x-ray, brain MR etc, nothing is found. About 2 weeks ago, I got cold. It was very bad. When I recover I felt constant pain on my left side, I guess it s where the heart is. It;s like stabbing pain. When I breathe it hurts. It s like one sport on my left side constantly burning for a week. Pain level increase and sometimes decrease. I feel dizy too sometimes. I don t know if I should go to ER since they could not do anything about it for the last 2 times. What could this be ?