You can build the path that you want to walk on, and decide which steps to take. It’s important to you—to your health, your goals and your family—that you take some time to exercise and plan healthy meals. You should treat it that way and give yourself permission to take that time without feeling guilty. The irony is that by being healthy and taking time from your schedule, you’ll be able to take care of more of that "other" stuff in the long run.
Besides, is anything on your to-do list really more important than your health? When it comes down to it, those choices may not be so tough after all.