wcote, I find all opiates make me nice & warm (I'm someone who's naturally cold most of the time; my body temp is even a full degree lower than normal). Often I don't feel anything from opiates except pain relief and that warmth. The few times I've shot h I really did enjoy the warm rush, though otherwise it wasn't recreational.
Pagey, I'm glad to hear you got some pain meds (DHC is one of the few opiates I haven't tried...but I find codeine pretty decent if weak, despite the fact that I lack the enzyme that converts it to morphine). While that Dr sounds like a proper idiot, IME that's not
necessarily a bad thing. Sometimes clueless drs are easily led, and will just prescribe you what you ask for, especially if you obviously know what you're talking about. Not always - some drs feel threatened by knowledgeable patients -but some are happy to have the patient call the shots. I wouldn't write this guy off necessarily.
If it's not a hassle, get the MRI, which will show him you're cooperating & trying to figure out what's really wrong, not just seeking meds. Also, drs can better justify opiate prescription if they ever come under suspicion when backed by recent xrays/MRIs, so that could be a big part of why he's asking for MRIs; xrays from another Dr & another country don't cover him legally. I'd recommend you make an appt for around when you'll run out of the DHC, then tell him how much it helped or didn't help and as necessary ask for higher dose/more pills, or a stronger opiate altogether. IME prescribing opiates on the first visit is a very good sign. It's something you can work with, until you've built up a good relationship and he feels comfortable prescribing you meds that will treat your pain properly.
Btw, you can thank me for the DHC, prayer works I tell ya!

:D