My Brain Feels Like Mush

I have spent the last three weeks literally cramming three different programs in to my brain. When it comes to memory retention I usually do not have an issue retaining that info except as of late. Lately it feels as if my brain doesn't want to learn that which is going to keep a roof over our heads and bred on the table. I do not like to fail, but now it feels like I am going to fail at keeping my life together. Today, I have a placement test to take for school. I think that is why my brain is doing what its doing. I want to do good on the math part of the test, so I have been studying algebra as well. Now you could say that people study lots of things all at once however, when you have not been in school and studying lots of topics at once one's mind has a tendency to crack. I have this fear that my brain is going to ooze out of my head and scamper off.  I try to not let my mind wander... it's too little to be left on it's own.