Thanks all for feedback, good to know DD's reaction is not unique, despite the Dr's insistence that this is unheard of.
Potted history: DX with CD mid-2012 after investigation of bloody stools, stomach pain, frequent BMs etc. Disease localised at stomach exit, patchy throughout colon. 6 months on Sulfasalazine, moved to Azathioprine after 6 months.
2015 loose stools and pain, Sulfasalazine reintroduced, no improvement after 4 weeks. Oral Prednisolone (30mg) for 2 weeks then upped Pred to 75ml via IV for 5 days, sent home and weaned off over 6 weeks. Deteriorated after 2 of the 6 weeks so moved to Sulf + Pred + Aza + nighly enema + EEN started (orally). 2 weeks later DD refused to drink so put in the tube. Now 3 weeks later still (so more or less week 5 of EEN) and she continues to vomit frequently and latest bloods suggested no improvement (after an initial improvement after 2 weeks).
Specialist admitted she took her off the steroid IV a bit early so that was inconclusive.
Specialist says that due to DD not taking full feed amount (due to nausea / vomiting) EEN also inconclusive.
Options are put tube back in and persevere with EEN again, try Pred IV again (for longer) or move to Infliximab.
Nobody seems to be willing (or able) to tell us what to do so clearly we have a distressed and sick daughter with parents under-educated to figure out what is best.
Does this seem like a normal 'suck it and see' process?
Inclined to think that EEN not working (as would have seen marker improvements), and can safely say that nausea not related to "48 hour bug".
Maybe time to try something new i.e. Infliximab???