Don't change your schedule. Just follow your week 3 plan. If you develop a pattern of coming short on your goals, you'll need to re-evaluate some things, but now is way too early. It's Base 1, for crying out loud; how much harm do you think missing your target for your whole Base period by 4 hours will do? Right - none whatsoever. Try and find strategies to stay on top of your riding goals. You will encounter hurdles, and part of this game is learning how to clear them semi-gracefully.