There isn't a predictable, linear progression to addiction. I think you're confusing the terms 'physical dependence' and 'addiction' though. If you use them therapeutically as prescribed, don't worry about physical dependence. You'll have a bit of withdrawal at those doses if you use them for long enough, but if used appropriately, your doctor will taper you off gradually and it won't be a problem.
Physical dependence on those doses will probably start after ~2 weeks or so but only very mildly so. Since your doctor gave you these, its something to discuss with him and nothing we can answer here.
If you have any questions, please feel free to private message me.