What should i do if i twisted my ankle and now its swollen. it hurts up to, my shin , what should i do..?

Sprain: Most likely, ice, pain medication and use elastic bandage is going to help, but if it is very swollen, i would recommend that you do a xray.

See a doctor: You sprained your ankle. You could ice it and eleveate it. If it hurts that bad you may need a walking boot or crutches. Just make sure you do not have calf pain as in the back of your head (or at least mine) one must always consider a clot which could be dangerous. Antiinflammatories can also help bring down the swelling.