Greetings and welcome aboard!

Definitely don't worry about the slip too much. Everyone does. Take the opportunity to learn from it and move on. In this case, try to figure out why the slip occured, what you might have been able to do to avoid it and, more importantly, what might have allowed you to get back on track the next day instead of several days later. If you can do that, then next time you slip you might be able to get on track a day quicker. Then a day quicker still the next time until you will be able to bounce right back on the wagon after a slip.

Cheers!