Just another end of class breakdown

It feels like life just gets too overwhelming at the end of a semester. Lucky me, this time I get to have 2 end of the semesters in one semester! We go to two classes for 3 hours a day each everyday for 3 weeks. Then immediately start another two classes for 3 hours each everyday for another 3 weeks. This means that I am leave my home at 6:30, do homework on the bus, get to school, do homework before class, go to class for 3 hours, do homework during my 1 hour lunch break, go to my second class for 3 hours, do homework/make phone calls until bus arrives, do homework on bus, step off the bus at 5:35. I have 3 more days of the first round and I am, yet again, on my period during finals. As you can imagine, I am tired and insane. My son picks up on this and during these times, I SWEAR, he becomes a terror. Don't get me wrong, I love my child but we have been fending off behavioral therapy for almost a year and a half now because, "I should be able to do it. I will just try harder to be a good mom." I just broke down and called to get him an appointment because yesterday me and my husband both said, "I don't know how much more I can take of this." We were supposed to get help before we said that. I feel like such a failure. (I know, I shouldn't, but knowing and feeling are different) Shouldn't moms know what to do? I feel like he is just so frustrated with his lack of communication and lack of control in life that he is acting up. If I know this, why can't I make it different? I know he needs to use his ipad more to communicate. How do I make him? I suggest it to him, I give him "bean bucks" for using it, I keep it handy, try to remember to take it places with us. But he is not using it in such a way as to decrease his frustration. Why? How do I change it? I don't know. But here I am crying on the bus and some poor kid just had to sit next to the dripping girl. Oh, there, he left (changed seats, that's how disgusting I am. I know I must be because he is willing to change seats and I am on the roomiest row). So I should probably stop writing and get back to my homework. My $^&*%#@ homework. Excuse my fake French.