Hmmm. I'm not sure I'm entirely comfortable with the idea that only abnormal bloods and fecal calpro warrant a referral to a GI. There are other ways for GI issues to present and typically these would be better investigated and monitored by a specialist gastroenterologist.
But at least your GP is listening to an extent. I would say that even with your history I would try not to worry about it being Crohn's but at the same time do keep a diary of symptoms (without letting that take over your thoughts too much, ykwim) as this can be really helpful to refer back to and to show your doctors. Try to include the effect it has on your ability to do normal things (if it indeed does affect you like that) as it's helpful to be able to give examples of the impact these symptoms have on your life.
I've done SCD in the past as an attempt to control Crohn's (without success) but also to treat SIBO -- for that I get a lot of symptomatic relief by excluding most carbohydrates and that's how I've recently been using it.
It is relatively restrictive but not a bad or unhealthy (at least for most people) diet to follow. Response to diet is very individual though, and that tailoring of a diet specific to you can be very hard work - and it's important to be aware that you may not benefit from dietary changes and can end up on a path to excluding more and more foods which might mean you have nutritional deficiencies in your diet and lead to more weight loss. This was the case for me in the past as really my bowel was only happy when I consumed minimal amounts to no food but I spent ages tinkering with eliminations diets in the hope there were some magic foods I needed to exclude.
I'm not in any way dismissing the benefits that some people with bowel issues get from dietary treatments - you'll read about people who find going on SCD, Paleo, IBD-AID or any of the other diets to be transformative. But there are probably at least as many people who have no response and end up very confused about what they should or shouldn't be eating.
My take on it is that it seems to be much easier for some people who are clear dietary responders but for those of us who have an unclear or very difficult to interpret response (there are many confounding factors, and we simply can't control all of the factors that affect how our guts behave) we can end up lost in a maze of dietary restrictions.
The bottom line I think is that if you want to try a diet - and it's a healthy balanced diet - go for it. Give it a sensible timescale to work but not too long because if it's not working you need to try something different. If it works for you and makes you feel good and you're getting all the nutrition you need, then great but regardless I would still continue with monitoring by your doctors to make sure that any GI issues (like Crohn's disease) are actually being adequately controlled rather than just the symptoms being relieved.
That said, if you want to chat about SCD then feel free to ask me questions and I can give you a better idea of how I eat on that diet and
the sub-forum is really helpful, plus a whole host of other SCD and Paleo (which is pretty similar) resources out there on the internet.
I would certainly talk to your GP about supplement drinks and a possible referral to a dietician. Also another diet that can be helpful for people with IBS (and apparently a lot of people with IBD also have IBS) is the low FODMAP diet - find info on that
here and, well, lots of places but this article
here is easy to read.
Formulas are expensive if you have to buy them but perhaps your doctor might agree that this is a good thing for you to try.
