I have had a pain under my left collar bone for some time. I am 35, smoker of tobacco and cannabis. I also crack my neck frequently which sometimes I feel is connected to this. It seems burping helps it dissipate some. Could it be indigestion? I am lactose intolerant and have had acid reflux (undiagnosed) for several years. Without health insurance I cannot afford to go to a doctor, but I am growing more and more concerned
With all the given history you better get a health insurance ASAP . this might be serious. All the symptom you mentioned indicate towards severe avidity and gastric ulcers and you shall need an endoscopy. Good luck.