I feel your pain. You left to raise your kids when there was still a good market for teaching, and now that you want to go back to teaching you can't. That said, I realize that this post is more than two years old. I didn't read though everything, but I thought I would add to it.
I went to a major university in NJ. They did not have an undergraduate teaching degree program. They told us that our state would be requiring everyone to have masters degrees so we were a head of the curve. Like a good little teacher's pet, I believed them. I should have transferred freshman year when I learned that about my school, but I didn't. I punched through undergrad focusing on meeting my major requirements for being a history major, my college requirements, and the requirements for getting into the GSE.
I was a fool. I got my masters, completed multiple long term subbing gigs, and worked my self into exhaustion every night. This went on for four years. I never taught the same subject twice with the same curriculum so everything I did was brand new. Now, my state has changed their tenure requirements from 3 years to 4 years. NJ is giving the school districts less money to work with because they want to put it into the inner city schools. So, the state of New Jersey has made it nearly impossible to get hired with a masters degree. Why should a district want me when they can pay someone less money for the same work? Besides that, since I did so many long term subbing gigs, I don't look competent.
So, I was out of work looking and applying to jobs for over a year. Now, I substitute in the district I live in and babysit my sister's kids. I have to live with my parents because I can't afford to live on my own. I don't even make enough to cover my school bill. Forget about having any type of medical insurance... Now, at 30, I've reached a dead end in just about every aspect of my life.
I can't get any other type of work because all I've done is taken care of kids and taught. I don't want to work retail because I'd be worse off than subbing. And I rather eat cat food than go back to working in a daycare. (Anyone who suggests working in a daycare should try it themselves, and hopefully they won't want to claw their eyes out by the end of their first day.) Everyone I talk to suggests teaching at a private school, a charter school, or catholic school. Which I've been applying to all along... (I went on one interview and they told me flat out their teachers only make about $23,000 a year, which in NJ isn't enough to live on.)
Other people suggest being a tour guide, working in a museum, or some other wonderful but unrealistic job, like corporate trainer or medical trainer. I'm stuck telling them that tour guides are in major cities or work as volunteers. Museum workers are volunteers, plus unless you're in the business aspect of it there isn't any money in it. Curators are expected to have an Art History Degree. Corporate doesn't go for people outside corporate to hire as trainers, plus I have no business experience what so ever. I thought I'd try to be a librarian. Nope, you need to have a degree in Librarian studies, and those jobs are getting cut all the time, so I doubt I'd have any type of future working in a library.
So, yeah, I have a worthless BA as a history major, and a worthless Masters Degree, as a social studies teacher. All the jobs I see on the major websites deal in retail or client survives. I'm an audio/visual learner, so anything that is solely on the phone would drive me to tears. Not to mention how abusive people are when they deal with client services.
So, yeah, you thought you were depressed, welcome to my world.