I know that hydrocodone stays in your system 1 - 6 days, supposedly. however if i were to take it 3 to 4 days in a row, is it going to build up in my system and remain in there for 16 days or more ?? I have really bad back pain and can't afford to go to the doctor, with no insurance. But i have a UA test on the 3rd of May and am very worried about it. I intend on drinking a lot of water until then, but i'm freaking out about possibly failing my drug test, and am very much pain. HELLLLLLLLLP !!