Ouch - really sorry about your finger - pain and frustration, great combination, aren't they?
I'm an English knitter who learned Continental because I thought it might be handy karma to have more than one way to sling my loops about.
Anyway, I don't hold my long straight needles like a pen, I actually tuck the right needle under my arm to stabilise it.
If you plough down this link:http://techknitting.blogspot.com/2007/01/circular-needles-back-and-forth-round.html
you'll find a diagram of this technique - the big difference is though that I NEVER, EVER USE MY INDEX FINGER to wrap the yarn. I always wrap the yarn around my MIDDLE finger and get the tension with my pinky.
It's a pretty fast way of knitting - I don't know if you have a pair of straights but they don't cost a leg and an arm to buy - and it's another way of knitting until your finger's healed and you can get your mitts on the Options.
Hope this helps.
All the Best