Is it normal if you can't explain things but its clear in your head?

You explained this situation perfectly well.

I've had the problem before. The only thing I've found that helps is simply practicing saying things to other people. It's helped me quite a bit in the last few years.

One of my bosses had a saying about this problem. If you can't explain it to someone else in simple terms, you need to understand it more thoroughly. It's most of the reason I come on these types of message boards and such. It helps put my thoughts into actual text that's somewhat understandable to an outside entity.

I also fail at it quite frequently when I bounce ideas around and lose track of where my train of thought was even going, like I'm doing right now. I'm pretty sure I had a point when I started this comment.

Yes, constantly.

Yes.:( I'm not really a wordy-type person.

You could have a mental disorder. I'm bi-polar/anxiety disorder and have racing thoughts. I know what I want to say in my head but when I speak it sounds like gibberish medications like lithium seem to work.

This is why I can never become a teacher.

I use to have this problem a lot. That is why I no longer write books. I don't write books because I could see the story in my mind but I could not put the story in words and on the paper. I would lose the story as I write. The problem is not because you don't know what your talking about, the problem is that when you go over it in your mind your picturing it. Think of a baby... Babies are very smart. They can't tell you what they want but they know what they want. Have you ever wonder how a baby thinks? If a baby does not know english then how does this baby think? Babies think by pictures and movements in their minds. They don't form words in their mind because they don't know a language. This is what you are doing. You have the mental picture and you may think some words here and there but for the most part you are picturing it. Its not bad to think like a baby, I actually think its a gift. Now,, I still don't know how blind and deaf people like Helen Keller thinks because she was blind and deaf from birth which means she could not see images and she could not speak a language. But even in her condition she still maange to get her point across to the world. Practice makes perfect. Just because you stumble here and there trying to get your point across does not mean you don't know what your talking about. Just pay attention to your thought process and start explaining to yourself in WORDS what you are trying to say. Or you can do what I decided to do and that is just be natural. Stop thinking all the time and just let yourself be. You'd be surprised at how well you answer peoples questions or explain things when you don't give it much thought. Good luck.

I always feel that way, lol it's normal.

Omg, yes! That just screams ME ahaha

Happens to me several times a day :/