All I can offer is that for meditation, you don't need to sit in a specific posture. In fact you don't have to sit at all, as long as you do not obstruct the airway. You can be in bed and meditate; I do!
As long as you don't fall asleep, that is...
While meditating, try to pay attention to the pain. I'm not sure what scale of pain it is, but for anything other than very serious when I pay attention during meditation it seems to fade (even if it hasn't gone away truly, it doesn't bother me as much).