Having been in the military I can tell you that failing a drug test is not going to help your situation @super_newby
You need to weigh the alternatives and make a decision.
A reminder that if you test positive, the penalties can be quite severe. I would abstain period. It isn’t worth it for such a short period of time.
I quit MJ for nearly 40 years because of drug testing. If I can do it for 40 years, you can do it for that short period of time.
Consider CBD Oil or tincture. It has all the Cannabanoids in it and no THC and will help you get through. They are available all over the internet. I use a place called Pure CBD Vapors.
A cheap vape pen is under 20 and the CBD Vape Juice, depending on the strength and size are generally under $100-
Please clarify if this is a medical doctor associated with the military or VA or is this your private doctor