I felt the EXACT same way. I thought of dropping out the first week,when you still can without owing anything,but didn't want to seem like a "quitter". After that I thought of dropping out over and over,even into the final month,I hated it that much. It was a rotten school and I could tell we were going to have problems finding jobs.
The thing to do is finish it and get what is owed you for the money you will be owing them, no matter what you do. Dropping out now will prevent you from doing an externship,graduating,getting a diploma,certified,blah blah. I kick myself for going to that school (and I am going to name it now-OHIO INSTITUTE OF HEALTH CAREERS) but knew then I would be kicking myself even more had I quit.
You also need to sit down and talk to a financial aid person about what is going to happen. I didn't owe anything until 6 months after I was finished with that school. How much more do you have in classes? Even if you could find another program you want to enter,there will probably be a waiting list.
Being an MA isn't all office work (what I DIDN'T want to do),there are other jobs for MAs. The trick is finding them. You might actually enjoy working as a medical assistant. But I know how you are feeling right now.