I'm not a doc, but I had similar symptoms when I got tendonitis in my wrist. My best advice would be to take a break from the computer if you can and limit the knitting. I ended up in a brace for three months because I ignored symptoms and the brace still comes out on occasion when I overdo it.
I would advise rest. As frustrating as it will be to be offline and not knitting for awhile, it's better than having an overuse injury, which could keep you down for quite a bit longer.
I hope it gets better.
WIP: Seat of Pants Arm Warmers
FO: Garden Paths Shawl, Rainy Day Scarf, MSCS