i wanna new job

So,
third shift transition has been decent, but I'm at the point with my workplace, that it's starting to spread me thin. I'm working for a company that can make no promises towards future employment and benefits, yet they want to work me to the bone, they want me to put in endless hours of overtime, and at a certain point it needs to stop.
Well, school has definitely brought me to that point a lot quicker then I expected. But I also don't have options right now. I feel virtually worthless in today's job market. And I wouldn't know how to sell myself. I definitely need to work on that. But on top of that, I need the money for school and all the other financial obligations I'm tied into.
Work has been especially bad of late. Mainly because the lady I've worked with the last 9 months or so is on medical leave indefinitely, and I am helping to shoulder the load with another guy, who has worked for the company, but is new to our equipment. On top of this, the work we do is sent down by a team of people who have too much work as it is. 3-4 people would have full schedules with this work, let alone just the two of us trying to keep up. And since I'm trying to stay on top of school, I'm not really working any overtime, which means we can't catch up.
And I can tell that this is bugging my because I'm typing fast and making a lot of typos, and I get angry when I have to go back and correct them. Whoooooooooooooo, do I need to relax. Anger management is something I'm working on. Mainly because I get angry over stuff I can not control. I would like to adopt a more balanced, peaceful approach. So that is was I'm trying. Don't let my emotions get the best of me.
So needless to say, I'm on a job search with very few weapons, but I will re-work my resume, and search for new opportunities that will work around school. But it'll be a long drawn out process.
And by the way, if anyone reads this anymore, and also reads Vanessa's blog: her's is more what I was aiming for in the term of blogs when I started. Except that didn't happen, and I've let it become more of a personal venting area, which, seems to be what blogs are popular for, but I don't like. I don't want to bitch to the world of strangers out there. but yet I do. how did I get here, and it's time to reflect. i doubt i'll change though