Hi thanks for asking question. Here are few possibilities in your case. 1.If you have associated abdomin pain and heart burn then chest pain might be because of gastric problem like acid reflux or peptic ulcer.omeprazole useful for it. 2.Second it can be simple muscular pain because of bed sleep posture , overexertion or muscle strain because of some unaccoustmed activity.simple analgesic and hot compress helpful for it. 3.If you have cold ,headache , sore throat then it could be as constitutional symptom in viral infection.symptomatic treatment done. 4.Fourth still symptoms increasing respiratory cause rule out by chest x ray or pulmonary function test. Complete blood examination useful.lymphocytosis present in viral while neutrophilia in bacterial Wish you good health.avoid stress as you don t have Seems to be serious cardiac cause. Dr.Parth.