I've been having this weird pain for months. it only lasts a 2-4 seconds. It just comes and goes. The first time I got it and when it usually occurs is when sitting or bending over. When walking or upright, I'm fine. On a scale of one to ten, the pain is either a 2, 3 or 4. It rarely occurs when I sleep and even then it hurts even less. Sometimes I don't have the pain for like a week. It doesn't worsen with exercise, no shortness of breath. there's no burning sensation and antacids don't help. Doesn't hurt to take deep breathes. Taking a deep breathe in sometimes helps.
It's usually on the left side of my chest, under the rib cage. I sometimes feel it in my neck, arms, jaw and right side of the chest. sometimes there's a slight tightness in my neck/throat.
If it helps, I'm in front of a computer all day (at work and home) and that's when I first got the pain. I'm 6 ft 270 pounds, don't smoke.