Pain between tailbone/anus when sitting + constipation months. colonoscopy reg w/internal hemroids. scared results wrong.my dad passed of anal cancer.

Sounds like you have: Coccydynia,although this needs to be confirmed by a physical exam.You should seek the help of a Spine Surgeon.The condition can be helped by decreasing any pressure to the tender area,physical therapy,steroid injections,and it still may take months to resolve. Chronic constipation-treat with regimen of daily fiber,hydration,and a non-stimulant.Discus with the Colonoscopy Doc .Good luck...