You might ask to get on the wait list for any cancellations that may come up for your GI doc before your scheduled appointment. You sound like you need help now and not in one month. Call them and tell them you can't wait a month because you're sick now. Call your general practitioner if you can't get help from your GI doctor.
I've had to do this before. Sometimes they need to know you mean buisness.
Colonoscopy is the best most reliable way to know if it is or is not cancer. Worry will make you feel more sick so try to find something distracting to keep you busy while you wait. Im the poster child for anxiety sickness and I know it really is possible to make yourself sick with worry.
When I was sick and still undiagnosed my doc prescribed Nulev for the cramping and urgency I was experiencing and it really helped short term.
So sorry you are feeling so unwell. Hugs.
Female age 38- ,2 teens.
Colon Cancer - DX March 2013
Age 34 at DX - Stage III B
Resection surgery -May 2013
FOLFOX - June, 2013 to Sept, 2013
5FU plus leukavorin Sept, 2013 to Dec, 2013
METs liver and lungs discovered Sept, 2015
KRAS - MSS
FOLFIRI plus Avastin - Sept, 2015 - July 2017
Durvalumab and Cediranib Sept 2017 -current
CEA at recurrence:10.1/august, 2015
CEA: 1.9 February, 2016
CEA: 16.4 March 2017
CEA: 90.1 October 2017