Candilass, I had pain and tightness in the same area. Turned out it was two things: acute stomach inflammation found through an upper endoscopy, and constipation caused by Irritable Bowel Syndrome and found with a lower endoscopy. My doctor put me on antacids that made me extremely ill, which I attribute to the cause being beyond his grasp and inflammation related, or food allergy related. I get these pains in times of stress, and, I guess, after eating allergens. I can se how relaxation techniques would help.