it sounds like tendinitis....
that's how mine started, is it a pins and needle sensation running from the tips of your fingers up to the elbow? I had the more severe form Carpial Tunnel Syndrome where the tunnel around the tendons get inflamed, you want to use a pack of cold peas 3 times a day and for exactly 3 minutes on the wrist. This gets rid of the inflammation until it eventually heals. Anti-Inflammatory drugs don't really heal the damage from my experience, then when it comes back the pain is even worse.
I got this advice from a private physio therapist after being really annoyed with DR's because it just wasn't healing at the time.
Change your posture as much as possible and try learning the Alexander technique or at least google it, the worst thing you can do is keep playing through the pins and needles/weird pain sensations because it will make it harder to heal