How are you managing time?

It’s 8:17 I jut got my 3 month old to sleep and I’m getting to eat for the first time today....instant oatmeal because I’m too tired too cook and I should’ve bought groceries two days ago. I’m overwhelmed to say the least. My husband works away from home so I’m my child’s sole care taker 300 days of the year. My husband supports us financially and I’m at home caring for baby and home. Somehow taking care of me has just gone out the window. Advice for juggling it all?