Never found anything that would take nausea away,
but if it was 8/10 in severity, the dissolvable (swallowing was not possible due to nausea and vomiting) would bring it down to bearable 5/10 for few hours.
Had all kinds of diets (FODMAP, gluten free, diary free, high carb low protein when vomiting got too strong, then low histamine, gaps-which was high protein and histamine...) and nothing helped. Only noticed that chocolate was an absolute no go for stomach, so are nuts/grains/rice for abdominal pain, but not stomach.
Hence after 8 months of trial and error, writing down food diaries and so on, we are back to a normal diet excluding a few things and nothing got worse, but also not better. Being more on the carb side, than protein side I have to say, being just easier to digest it seems. I try to hide some soluble fiber since we love avocado.
Also dealing with chronic constipation with Movicol like you (how funny), the problem:
gastroparesis friendly diets are low in protein (hard to digest) and very low in fiber!!!, but for constipation one should have some fiber plus hydration......bit of a catch 22 and need to tackle the bigger problem.
Happy you see a dietician, we did too. Please ask about this catch 22.
The gastroparesis test should actually be done prior medication to indicate medication. Also since medication should alter motility, .... how should it represent what was going on without medication, if that problem existed in the first place prior medication. I don't quite understand it. If gastroparesis existed with medication, well, it's obviously not working or not enough working. But if there was no gastroparesis with medication, one will not know, if you needed to take it. ??? But little do I know. There must be some logic behind it.
Motility problems run through the whole digestive system.
So if the stomach is slow, it comes to no surprise the colon is slow.
Or if the colon is slow due to constipation, the stomach often keeps food cleverly back.
But as to why: that is the big mystery. Some say 'temporary virus damage', some say 'general systemic muscle/nerve' weakness, some say 'diabetes', some say 'connective tissue issue like hypermobility syndrome', some say 'hormones', some say 'SMA', some say 'pylorus hypertrophy'. Hence the basic blood tests (electrolytes, glucose, thyroid) and scans/scopes are usually done to rule out obvious and treatable cuprits.
Once those are not found like in my 14yr old girl,
they shrug with their shoulders and get into the 'ideopathic' (=we don't know) draw, which is highly unsatisfying.
No idea what is going on.
It is good that you note down what you eat and how you react.
Proteins stay longer in stomach anyway due to being digested in stomach.
Yes, write down what you eat when and when you notice a change in symptom severity. That will give clues for docs, dieticians and for you to avoid certain things. The reason is often not found, but if you find foods that are easier than others, then that is already a big win.
We are on small, but very frequent meals, too.
All all the best!!!!