There might be another problem. I am a heavy computer user for work and 15 years ago I injured my hand. The constant computer work did not allow the hand to heal and I developed sharp pains in my hands while shooting.
It was inflammation problem.
You might have another issue that the shooting is aggravating.
I found I could not shoot my glock 19 without stabbing pain. I had to rest my hand and found I needed a minor surgical procedure.