Ouch! You have to get more "you" time to rest and rejuvenate. I know you are passionate and responsible about what you do. But health won't become better if you ignore the signs. I had wrist pain during my studies, and I ignored it for hours and months, because of the pressure the studies put on me. And it didn't not pay out! I still have problems holding a mouse for long or scrolling 4 years :( I cannot play games as I used to (only can play with controller, which is a huge luck), and typing gets hard pretty soon. I was diagnosed with muscle strain that had become chronic, because I didn't let it heal while it was still possible. So, please, heed my advice: DON'T IGNORE YOUR PAIN. Pain killers are not a solution, rest is. Wishing you the best.
Also, you could try using programs that remind you that you need to rest and stretch during computer time. I used one to forced myself to get rest after every 45 minutes, which is bizarre when you're concentrating on something, but it did help me reduce the pain, especially not having the pain at night and being able to sleep. Now, if I use the program, it drives me mad sometimes with those annoying reminder messages xD, but I can work at computer and avoid health complications.