Chest pain for year now. sometimes sharp, or deep cramping/clenching sensation. sometimes feel spasms in chest but do not see them. all tests normal.

Multiple: Chest pain can be a symptom of heart disease but may be may other things such as esophageal spasms, great vessel disease, respiratory disorders (asthma, COPD, bronchitis, infections), and muscle problems to name a few. It really depends on the clinical situation and other symptoms you may be having. At you age it is unlikely to be of a serious nature but if concerned discuss with your doctor.