Looks like we are into a "pissing competition" here with who's got the worst shoulder .. lol .. here's my effort .. came off my Ducati Diavel (speed disclosed for privacy reasons .. lets just say a little over the limit) from a collision with a unridden motor bike coming across the road infront of me .. never saw it coming .. 4 days in a coma .. 3 weeks in hospital 3 ops later .. shoulder fractured in a 11 pieces .. now have 34 screws, 4 plates, and 3 pieces of wire holding my shoulder together .. bicep, delts and trapezius muscle torn off the bone and then surgically put back on .. so ive had every injection there is out there in attempt to stop this pain i have non stop since the acco .. sadly none of the injections have nullified my pain .. :-(
So good luck with your injections i hope it all works out .. non stop pain sux .. !!