A friend of mine posted something on Facebook that stuck with me and made me come to this realisation, she said "...being healthy and strong is a lifelong journey, so you don't have to rush." And she's right. It's a JOURNEY. I can't never have unhealthy foods. That's impossible (for me, anyway). But rather it's about moderation and self-control.
So if you've fallen off your health and fitness journey (or any other goal you've set for yourself), brush off your guilt and pick yourself up. What matters is that you achieve your goal and not the length of time in which you achieve them. Surround yourself with positivity and keep moving!