And I don't know why. Recently, I've started stuttering (it comes and goes), I get my words mixed up in a sentence, I get the beginning of words mixed up (so instead of saying "silly cat" I'll say "cilly sat", for example), and if I'm spelling a word I may miss out a letter or get them in the wrong order.

I'll go through periods where I'll think constantly, and I'll have a constant stream of thoughts, then they'll get out of hand and they'll just carry on going into triggering thoughts. Then something will go "shut up, just shut up" or words to that effect and it'll stop, and I won't be able to recall what it was I was thinking of. I'm going through a phase now where I'm just not thinking at all, and my brain is just empty, no thoughts going through it or anything.

Why are these things happening? I'm confused.