Over the past couple of months I've noticed a change in my digestive system...whenever I eat something it seems like a sort of congestion in my digestive process,mostly lower intestine. It feels sort of inflammed. I've researched all kinds of conditions similar to this but can't seem to narrow it down as I don't have all of the symptoms. There's not really pain,nausea,or diarrhea etc. Just feels congested. I've taken all kinds of laxatives but it's still there. I've tried eating lighter but then I become hungry and lightheaded. Should I look into a colonoscopy or something?