bought a Wacom tablet/pencil

This isn't necessarily a solution, could just be shifting the problem and it'll come back eventually, it still puts strain on your wrist and fingers.

Biggest solution for me has been making sure my desk is set up right for me, chair has to be high so my arms are aimed down towards the keyboard. Also things like the low travel butterfly switch Macbook Pro keyboard are ticking RSI time bombs, due to the increased intensity you have to hammer at the keys and the sharp stop of the low travel. Get a good external keyboard.

I also remapped a few keyboard shortcuts I used often that were extremely painful to do which might have been culprits.

Suffering through it for 6 months is a big mistake, the second it starts tot occur you need to change something because even the slightest pain will take over a week to heal and it just gets longer and longer the more you leave it.