Liquidblue,
I *totally* get the overwhelmed thing. As a full-time homeschooler, part-time employee, and the person who is supposed to cook and clean the house, I know there is no time for all of it. I find myself saying, "Well, I could exercise or I could cook dinner. I could exercise or I could go to the grocery store. I can't do both." This is the reality of my life. I could get up earlier, but that would make me miserable and cranky. I don't want to be miserable and cranky.
I can give you tips, but what I most want to give you is sympathy. It's no fun wearing many hats. I'm sorry you have to work all the time. That can be debilitating for sure.
So what to do? I kind of bargained with the hubby (we didn't really talk about it, but the surgery made this clear) that I needed to focus on myself this year. Why have the surgery otherwise? So when it has to be decided if I take the kids to their stuff or exercise, more and more I'm choosing to exercise. I don't get to do it as often as I like, but I'm letting something else go so I can squeeze it in more. I try to let different things go - at-home work stuff one day, laundry another day, grocery shopping another day. It has that "nothing is done right" feeling about it, but I'm learning to live with it.
I eat ready-made stuff a lot. Little tins of tuna are my friends. As are cheese, canned Beans, applesauce, and yogurt. I eat what's easy. The kids also get what's easy a lot, which doesn't add up to great meals all the time, but hey, they can survive it for a year.
I hope some of this helps. It may not help at all - other people's advice often doesn't. If I remember right, you just got back from a trip to Vegas (yes?), and I am at my lowest and most harried right after a vacation. Maybe tomorrow will give you some breathing room in which you can take stock (and maybe decide to let go of some activities?). I hope so.