If i was you i would try to suffer it till Xmas , go private and get a cortisone injection just before the Holiday rest it for at least a week the injection costs around £80 but for that you will get it done when you want but rest it put it in a sling if you have to , if that don't work then its carpal tunnel surgery which will means 4/6 weeks rest. In the mean time acupunture is worth a go.