Thinking/Worrying, what is it? A thin line?

Sometimes it feels the world is falling apart for you. You cry like a kid even though you know it's not going to help. You try to think but it seems that your brain has emptied and there is no thought formation. You try to rationalize and all that comes out of it is irrationality you first started out with. It seems you have no more road in front of you. It seems you are standing at the top of a cliff and you say to yourself "This is IT" ...


I had sent the above lines to my friend for review, and she said, "Actually, first your mind will be flooded by a thousand thoughts when you try to make sense out of something that you will not know which one to take and which one to leave and then after this flooding you will reach the state of no thought formation, not before that". I thought for few minutes and  I replied back to her as " yeah you are right, I  have gone through what you said many times !!!"

But it got me thinking, it had happened to me a few times, but in actuality, I am not flooded by a thousand thoughts every time I try to think. I started putting up all my good and bad experiences in life so far, trying to remember the time when I was flooded by thoughts, and not to my surprise, I did not get many, not even close to five. 
I realized that, I don't make sense, even for a minute, when I try to think.  When I try to think, all I do is curse myself for whatever I have done which leads to self loathing and there I stop thinking and that's it. So is this what is called thinking?  If not what is this? And why did I reply back the way I did?  Well that's a different story altogether.

Finally after a long contemplation, came to the conclusion that I cannot think, I mean I cannot think rationally at all. I used to think that, I think too much and that is my biggest problem in life but the actual problem is, it's worrying and not thinking that I do. So all the thoughts I thought I was thinking are actually gibberish which make my thoughts empty... 
So, trying hard to segregate thinking from worrying which will make life much simpler !!! is it not? :)