Starting_Over_Again

I need a little boost in my confidence and some help on keeping my eye on the prize. A little background about me : I'm a 22 yr old single mom, I live with my mom, I work 40 hours a week, and I took 13 units this semester (I needed the full finanacial aid lol). I just feel like I'm slipping a little on my way to the end of the semester. I really am a good student, but there just isn't enough time in the day. I was doing really well until my work changed my hours from 7am to 4pm which allowed me to put my son to bed everynight and study every night. Now I am 2pm to 11pm which means I don't see my son as much and I'm crunched for study time. Of the 3 nights I'm home next week, I have to go to the library for 2 so I can work on an english paper which means I can't put my son to bed. I'm feeling really overwhelmed...and this is just the LVN pre reqs! Anyone have any ideas? I already use my lunch break to study but I just feel like it's not enough. And I've already cut out most of my sleep, but I could cut out more. I'm really needing some ideas and some uplifting to keep my eye on the prize.