How long does it take till you get out of shape?

I am in great shape right now for soccer. The problem is i am sick and high school soccer season just ended. On tuesday I played my last game and since then I haven't done any physical activity besides ab exercises (Again cause I am getting over bronchitis). Basketball conditioning starts on Monday. Do you think I am out of shape, and that it will be hard for me? Please help...THANKS (: