Regarding the ER. I went many times, but found it to be worthless for any sort of pain treatment. For full disclosure I was treated like a drug seeker.
On one of those visits, after a negative reaction to two antibiotics and an inability to walk due to agonizing pain, (I was yet to be diagnosed for CRPS) an incidental brain aneurysm was discovered. I was sent home with no pain medication, crutches and a follow up appointment to discuss brain surgery.
There's an opiod epidemic in this country, so it is somewhat understandable that the ER staff are reluctant to treat persistent pain. Call your PCP, he might give you enough tramadol to tide you over until your PM appointment.
Look up voltaren gel, DMSO and frankincense neuropathy oil.