I would really appreciate some thoughts or advice on my situation please.
A brief background so as not to drip feed: I've experienced gastrointestinal symptoms of early satiety, nausea and discomfort/bloating since Spring 2016, which has been attributed to delayed motilty/gastroparesis. I have POTS and possible EDS so this is a common comorbidity. I've only just seen a gastroenterologist (December 2017) and am booked I for an gastroscopy and biopsy at the end of this month, as well as a Gastric Emptying Study. I have significantly low B12, calcium, vitamin D and folate levels (discovered in November 2017) which are being treated. I'm under a dietitian.
Since August 2017 I've been on the elimination stage of the Low FODMAP diet which includes cutting out all gluten. This has made me feel so much better - massively reduced nausea and enabled me to eat solid food, put on weight, feel less fatigued etc. I know the elimination phase should only be 2 months but to be honest I have been really enjoying not feeling ill constantly so have been unwilling to rechallenge foods.
So now for my actual question... The first food I rechallenged was white bread. I had one slice on Tuesday lunchtime and two slices on Wednesday lunchtime. I should have had three slices yesterday to complete the challenge but felt too unwell to continue.
My symptoms on Tuesday were: bloating, abdominal discomfort (not pain - more a feeling my stomach had been 'scraped out') and constipation.
My symptoms on Wednesday were further abdominal discomfort, constipation, rising nausea and encroaching fatigue.
My symptoms on Thursday were extreme nausea all day, extreme fatigue (falling asleep, unable to get out of bed etc), further constipation and a mouth ulcer.
I've yet to eat or leave my bed today.
For those of you with coeliac or gluten intolerance, are these the sorts of symptoms you get after eating gluten? I had a blood test when I was eating gluten in June 2016 which came back negative. Subsequent blood tests have been since I have been gluten free. I have now had the gene test but no results yet. I am having biopsies with my endoscopy in a couple of weeks but obviously I have been gluten free and I know the Coeliac UK gold standard for the gluten challenge is 6 weeks prior to endoscopy. I did mention this to my gastroenterologist but he didn't seem concerned.
So questions...
Does my symptoms in response to my food challenge sound like coeliac? Or gluten intolerance?
Should I continue with the next two challenges that are pasta and weetabix?
What's the likelihood of getting a diagnosis if I am coeliac with my upcoming gastroscopy? Given my recent vitamin deficiencies but the fact I have been gluten free - how long does the gut take to heal?
If not coeliac, what else could this be? Fructans intolerance? Gluten intolerance?
Thank you in advance x