Will anything bad happen if my underwear elastic is too tight? i am beginning to have pain in my stomach. will more bad things happen? cant change it

Stomach pain: indicates the need for you to see your doctor. It may be from something other than tight underwear. I also see that you have difficulty breathing, which is another reason to be monitored by your doc. I see that you are getting behavioral therapy. Ask that doc about modalities such as biofeedback and clinical hypnosis. See www.relaxationresponse.org for some self-help also. Peace&good health.