Getting back into a routine is hard, especially after these holidays, I agree. Been working on getting back into mine since after the the 1st week of January. I am diabetic so fasting is not healthy for me, but is something I used to do when I was younger. Kids do have a way of throwing a wrench in the works, but they are worth it.
Hope you find your routine again soon and are able to get back into the gym routine as well. I start my Tai Chi classes up again next Monday and need to get back into a better walking routine.