What to do if I did about 3 vicodins this past friday, and I fo see my dr monday, and I know I will be drug tested, will they?

Yes. hydrocodone persists in urine for 2-4 days, and the odds are good that you will test positive. I would suggest that you think more about the fact that you are using drugs, which I presume are unprescribed, even when you know you are subject to testing. This indicates a very likely drug problem, which you should be worrying about a lot more than getting caught at it.