Tummy discomfort

Been having tummy discomfort since Monday. Don't know whats wrong. I went to 2 doctors already and all they told me is that I have constipation and a lot of trapped air. I took pills to relieve my constipation but my tummy still aches. I really don't understand it. It makes me feel horrible and I can't work properly. It also wake me up in the wee hours of the morning. Gosh! Help me and please take away this discomfort!