So you might have learned all this already since it's been a few hours, but whatever:
I'm a regular kidney stoner, and I am frequently in the ER due to it. They usually won't do a lot aside from pain control and imaging unless stones are causing such ridiculous problems that they need to be immediately surgically removed. Urologists can generally do ESWL to destroy stones before they could potentially cause problems, but not in an emergency setting. They could maybe do some surgical procedures if it's bad enough, but they usually will not, in my experience, unless it would be really dangerous to wait--like if you only have one working kidney or have a bilateral obstruction. Canada may be different, though.
I had a large stone get stuck in my right ureter in late December, and it had to be surgically removed via ureteroscopy with laser lithotripsy. They wouldn't do the surgery at the hospital, so I had to wait for
three days for my urologist to do it. Three days with that constant pain was totally unbearable. I ate nothing but pain pills. I remember phoning the on-call urologist about a day into it and essentially begging them for mercy... lol. Generally the other kidney will start to relieve the pressure from the one that's having problems, but I had major hydronephrosis during most of the wait. No fun. I get stones several times a month and sometimes even several times a week.
They can give you a medication (tamsulosin) that dilates the ureters so that anything stuck will usually be able to pass more easily. I find I usually leave the ER with that and an opiate prescription if I go in with stones, and sometimes antibiotics since urinary tract infections, including pyelonephritis, become a risk in the context of nephrolithiasis.
Hopefully you already passed what was in you. The lingering pain might just be from your ureters being harassed by the stones you passed. I hope things get better; stones freaking suck! I think it's the worst pain imaginable, but I guess I haven't experienced everything.
Unfortunately stones are more common in people with Crohn's, but hopefully it doesn't become a major issue for you.