Until you are able to see your pdoc on the 18th, I see two choices:

1. Endure the smoking withdrawal symptoms. 4 hours without smoking, although it will be unpleasant for you, will not kill you.

2. Purchase the patches. You can save money by not purchasing any more cigarettes.

Just try to keep in mind that it's only 5 days. Congratulations on your new job and I hope it goes well for you!