Consider that when you go to the ER the only drug in your piss better be the hydro you are scripted not street morphine. Otherwise you will be labeled a faker and junkie and charged 2K for it.
Piss in a bottle right now (assuming you only have hydro in your system) before you take any morphine and freeze it. Bring it with you along with a warmer to any medical clinics you go to and submit it for your urine sample and let them know it is prescribed to you. If you have weed or alcohol in your system fuck this idea and PM me if you need to know how to get the right piss sample for yourself....I set up clinical drug testing labs from scrap for a few years of my career.
I think 1 15mg morphine ER will be a good starting point if you are taking 10 mg hydro IR. It will probably be weaker than the 10mg hydro or about equal.
I wouldn't even bother with the ER. They are programmed to call anyone in pain a junkie. I'm a doctor myself and have been treated this way in the ER....they are a vile bunch of medical professionals I don't know what the fuck is their problem. The only type of pain they will administer an opioid for involves severe visible trauma....and there will be know extended script to send you home with.
Get to a primary care doctor appointment asap is my suggestion. Find the oldest male white doctor you can (assuming you are white), like over 75, and go-to him.