Can you worm your kitten at 2 weeks?

That would depend on the drug used, but it's typically not recommended to deworm kittens until about 3 weeks of age due to the lifecycle of the parasites that should be targetted in a kitten that young (roundworms) and the drugs that can be safely used in kittens.

There are of course other parasites that can cause issues in kittens under 3 weeks of age, but you cannot purchase over-the-counter medications for them nor can you diagnose them simply by looking at feces for worms.