In reply to Dan_F:
I'm also 44 and was stuck in a similar injury cycle. Stuff that helped me get out of it:
I frequently, as others have said, did too much too soon.
I only have one or two hard sessions a week and do easy circuits or easy routes the rest of the time. I try to space out sessions on hard projects so I'm not doing the same move hundreds of times in a week.
Injuries never really come out of the blue. I'd have ignored a niggle, not warmed up, been dehydrated/tired, tried a move at my max far too many times, suddenly done a crimpy project after being on slopers for the last month, that sort of thing.
Rest in between attempts!
A bad day is a bad day - my projects can wait if I'm not feeling great.
On a similar note, if a problem has a load of horrific crimps (I'm not great on crimps!) or feels tweaky in some way, I'm much more ready to walk away these days.
Annoyingly I learnt all that the hard way - maybe some of it helps you?
Hope you're injury free and climbing hard soon!
Edit - actually I think all of that comes down to being patient. I feel like patience is something I've learnt as I've got older and it not only seems to be keeping injuries at bay, it's also means that I'm bouldering harder than ever in my 40s. It's not too late!
Post edited at 11:23