I think it is better to know what you have so that you can be guven the correct treatment. I hope that you dont have crohns but if you do then it is the start of your treatment and moving forward.
Good luck 2moro
Sorry you've had to join us here but you've come to the right place - you'll find so much support and information on this site. I wish I'd known about it when I was diagnosed!
I live in London and echo what the others have said, it's likely that you'll start to be seen at your local hospital clinic under the care of a gastroenterologist. I only tend to go to my GP to get my prescriptions these days, everything else goes through the gastro doctors who are much more specialised and knowledgeable.
I also have a very twisty bowel and find colonscopies very uncomfortable. They just tend to knock me out for them now as they're too painful otherwise.
Sorry to hear you might be facing surgery already but don't worry until you actually get to speak to the surgeon. They really discourage operating unless it's absolutely necessary and your quality of life is untenable. I've had surgery and it was awful but I got through it and so will you if you have to. It's amazing what becomes normal!
In terms of diet, again I echo what the others have said, you just have to find out what's right for you.
Let me know if there is any other advice or help I can give you.