Pain management (oxycodone 5mg & morphene extended release 15mg)

I suffer from pemphigus vulgaris I wonder will I be ok taking morphine ER and oxy. Or doubling my dose on oxy I don’t really feel it unless I add acetaminophen n that last like 2 hours. Doesn’t really do anything I be mostly in peak pain at night I’m trying to avoid overdosing part of me feel like I’ll be ok. I’m seeing a whole lot of ai responses of don’t do it blah blah I be in pain til my treatment is scheduled