I was wondering about this myself as I have been using CBD and particularly CBDa capsules legally available to buy here in the UK, and if it is just for pain relief you might well get away with just using these, even if they aren't as much fun. A doctor could advise you on these; they are legal but sold as "food supplements" - but on the other hand the doctor might not actually know much about them.
The different brands seem to vary - one (CBDa) at the low dose of 25mg daily, switched off the numb, wooden sensation in my foot resulting from chemotherapy - just switched it off like flicking a light switch, although it returned when I ran out of those particular capsules. Another brand - CBD this time - similarly reduced my long-standing tinnitus to a whisper although this too was only temporary. However, recent operation scars started weeping again and bruises which hadn't been shifting turned bright red and began to break up. I concluded that something was being done to my circulation and went on line to find out about it; I couldn't find much as most of what was there was about THC and was biased towards making it look dangerous - but it does seem that cannabis can somehow open up your blood vessels or smooth the passage of blood in some way so that although the heart beats faster the blood flows more easily? Someone likened it to putting a car into a lower gear. That's how I understood it, anyway. It advised against hard exercise while using cannabis as the heart is already working harder.
I think this was the most useful site - I hope it is OK to link to it here?