Thinking so hard you can't think

Have you ever thought so hard you couldn't think. Like if you tried to put words to paper at that moment you wouldn't know what to say.

After an argument I feel a sense of blame, its all my fault, if I would not have said or did this; this wouldn't have happened, and it goes on and on and on. Then I get an urge to stand up for myself and say "no this is how I feel and it is not my fault". But that urge does not last long... its like that breathe I try to take.... it doesn't last long. And again they win. He wins, the thoughts win, the depression wins, all the crap wins.

What can I do to change all of this?! Will I ever get that answer?

This is one of those times that I am thinking so hard I can't think... I dont know what to write.