Seriously, HOW DO YOU DO IT?

For those who are moms who work, how do you do all of it? Just over two weeks and I just can't get it all done! Like now I need to be cleaning and baking for everyone to come over tomorrow. Most days I come home exhausted! I can barely get a load of laundry in. Forget folding! The family has really stepped up to help me, but there is so much I need to do on my own. I just feel like I am not getting there. Chores need to be done, I really need to be studying to catch up with all the people who have been in the pharmacy for years and with those who have gone to school for it. So many, including my boss, think it's better to learn from working. But no one prepares you for how much there truly is to know. Not for a lack of trying. It's just once you've been there for a while it's all second nature.
And you can forget me time! I have a book over due I want to finish reading before I return it since there is a huge wait list for it. It would be forever before I got it again. It would be a fast read if I could just get the time with it. I also fear my newly learned knitting skills are running away due to no practice. And there is so much I want to sew.
I know it would all be easier if I had a steady routine worked out, but m y job is one that has a different schedule almost daily. And being part time and putting down you would work any time just to get the job makes it even more likely to have an unsteady schedule.
I just need to plan it all out as best as I can, but how do I do that?!
The other thing I hate is I don't feel as involved in my kids lives anymore. I still stay on top of grades and work to find out what they are doing in class, but it just doesn't feel the same. I will keep an eye on things. Maybe the more independence will be good for them, but they know if it makes it worse I will quit and there will be no happy campers here!
Ok, time to get to it and try to get all the cleaning done and hopefully some baking too. Hopefully I can schedule in blog reading/writing in too!