My doctor faxed my perscription to walgreens?

She said my medication is through Walgreen's and that it will be shipped directly to me but that I should get it as soon a possible since it is absolutely vital to have at a certain time. Well so she gave me one actual prescription for one drug I need and then gave me the printout of the other drug that showed she faxed it to Walgreen's. (the one from Walgreen's is an actual shot not a pill) So do I have to do anything now? I went and got my prescription filled already for the one she gave me the actual prescription to at walmart, but what about the other? Do I just wait for them to ship it to me? She confused me since she said I should get it right away but then didn't give me a prescription. So if she did it herself, why would she tell me that then?