Day 2 back on track

I'm on day 2 of being back on track finally after the holidays and the death of my mom. Being so stressful here lately and down that all I have wanted to do is sleep. No motivation to do anything really even though I know i should. I had one 8oz glass of tea today but water the rest of the time. You would think with the burden of not having to take care of mom all the time was lifted I would want to do more but going from taking care of 2 kids to 3 is hard. I know I can do this I have to for my sister and kids and me . I have been overweight most of my life and I am tired of it just need more motivation