Welcome to the forum but sorry you had to find us.
You certainly did the right thing by making an appointment to see your doc.
I would definitely recommend demanding another colonoscopy. There are a bunch of different things that could be causing your symptoms and the best way to rule all the common and nastiest ones is with a scope.
CRguy will tell you the same - Do not take ‘No’ for an answer.
Get the scope and then come back and tell us the good news!
Dx Oct '15 w/ Stage 3c RC/ CEA 8
Nov '15 - Jan '16: 3x FOLFOX and 5wks Chemoradiation w/ Xeloda
March '16: ULAR w/ temp ileostomy
Complete pathological response incl 0/12 nodes
May - Aug '16: 9x FOLFOX (dropped Oxaliplatin for final Rd due to neuropathy)
Clear CT scans in April ‘16 (NED), Dec ‘16, Aug ‘17, Feb ‘18, March ‘19
Feb '17: Ileostomy reversed
CEA Post Surgery: ALWAYS 2