Constipated & having feeling of pressure when i sit in my lower center/right abdomen area. no tenderness or pain. could i just be really constipated?

Constipation: Depending on how long you have felt like this, you could start with a cellulose or fiber supplement daily, do not give it more than 72 hours. A physical visit to the office I including an abdominal exam and a pelvic exam with diagnostics studies as warranted, some basic blood work and and UA. If you have the family history or at the right screening age, a colonoscopy.