Hi Bizzy Lizzy,
Sorry to hear you are experiencing shoulder pain through rad's....and a few suggestions which you might want to consider.
If you are experiencing nerve pain, you might want to ask your doctor if something like Amytriptyline might help? From what I understand it is more targetted at nerves.
You should be continuing to do the exercises that you did post op to help ease tightening through rad's, though I sympathise that exercises starting when in pain aren't the best, but it might help ease it?
One very simple exercise which may help your shoulder could be yoga arm swings. You stand up, feet below you just slightly apart, knees very slightly bent (as opposed to locked bolt upright). Raise your arms up in front of you (no higher than chin level) and then gently swing them down and back, then down and forward (if someone was looking at you side on you would be moving your arms from 6oclock straight up to 9oclock then back to 6 and back/up to about 4 or 5 oclock, what ever is comfortable). Carry on very gently and it usually helps ease should mobility. Fine to do them for 10 mins or so...most people hear a bit of clonking as the should loosens up.
Try and stick with the rad's. You could also ask if it would be possible to have a referral to a physio, but I appreciate waiting times may mean this doesn't fit the rad's programme.
I hope it improves. Sending positive vibes (from someone who is much further on and way post rads).
Seabreeze
x