Yeah, it would seem easy - you're in pain so go to a doctor and demand a supply of meds that will kill all pain... sadly this isn't the case.. with narcotics doctors are not quick to dispense high doses, even to someone that really needs them, and ER's are less likely to give you more then a few days supply of something like Percocet .. it IS possible though... a few pointers:
1) DEFINITLY take your medicine bottles, ALL OF THEM! However, an important thing is that the dates are right - do NOT bring in a bottle of OxyContin dated 15 days ago with 3 pills left... if you got a 30 day supply then that script better be dated at least 30 days ago if the bottle is empty .. another point thats even MORE important is the names on those bottles - if you have differnt doctors prescribing narcotics, you better have a damn good story - i.e. you can have your OxyContin which is from your "pain doctor" and then you can have some IR's which you could say was prescribed after you had some surgery recently, of course you better have a good story about WHAT was done .. I dont know enough about Chrons disease so I couldnt tell you what all you can claim...
2) Make sure you complain about not being medicated enough previously, cite your tollerance to current opioid medications and give a story about your previous experience by where the last time you were in the ER they didn't give you enough - still, most hospitals have a policy where they will give you a certin dose of narcotic pain killers, they wont give more because tyhey have no way to actually determine what your TRUE tollerance is - you could be lying and have finished off all yer meds weeks ago, dropping your tollerance .. yeah, the entire idea of insisting that you're still in pain and need more seems right, but more often then not you wont get more unless you're in the ER for an extended period of time ..
3) Offer your pain doctors phone number - even if it's 3am, it doesn't matter, this furthers the image of being a true chronic pain patient and shows them you have nothing to hide and are even OFFERING that doctor for their consultation.. see, most seekers will speak of "my other doctors" prescribing habbits but the last thing they want is for that doctor to be confronted about it ..
The above help, but in the end it's luck of the draw in what doctor you get... I have been to the ER crying in pain and only got a tiny opioid injection, and 10 Vicoprofen .. then again, I have casually walked into an ER and got 2 heavy blasts of morphine followed with a script for a weeks worth of OxyContin and even MORE OxyIR - same hospital, differnt doctors ... but DO NOT GO IN THERE WITH THE ATTITUDE OF "I have a legit problem and a legit tollerance, I need more meds and wont take anything less" .. while that is actually CORRECT you might come off as a seeker, in which case you wont get shit! Sorry, I know it's not fair, so don't reply to argue with this point - I am simply stating the way things truely work...
If you're a female and get a female doctor, you're doing good... a young male with a male doctor seems to have the worst luck.. if you're lucky enough to get to speak with an anesthesiologist you will do even better... so go in dressed like a presentable young adult, have those prescription bottles (mind the dates) and have your doctor(s) names and phone numbers, it also helps if you have "the friend" to comfort you (and to 'drive you home' so they will dope you up good!) .. this friend has to look even more presentable then you do!