I fractured my tibia 2 wks ago, and I got half cast on it, if I can walk on it with no pain what?

It's a hairline fracture and the 1/2 cast supports it. I had one when I had soft tissue damage after hurting my ankle. Be thankful you have no pain. Still rest it up for a time during the day and don't overdo it. 1/2 casts aren't true walking casts.