Yes thats very true, they most likely will discharge you very quickly, because if your condition is idiopathic, they cant do anything. Your best bet is to call your rheumatologist, or pcp, to schedule appt and tell them about your pain.

When i suddenly loss my smell and it dint go away the next, day, i had to go to the ER, because it could be a stroke, but when i ended up there, i was there 5.5hours and they never found anything that cause my loss of sensations,tingling and smell loss, they eventually discharged me with no answers, and reccommend i see my pcp(who doesnt believe me) to get a referral. MRS.D is right, er gets alot of those drug junkies, that go to er just to get pain meds.