is there a blockage somewhere?

sometimes i think I have something to say, then I realise I do not know the words to express those thoughts, its almost as if something gets lost in translation. What feels like a deep thought infact turns out to be pure nonsense and of no importance at all. One may consider it as a blessing or a curse, Either way it bugs the crap out of me. I hate being stuck in my thoughts to the point where someone asks me what I think of something and I say 'Its different' simply because my head is scattered a million miles in different directions. It's different doesnt mean its bad, It simply becomes a safe answer meaning... I have thoughts about this, and feelings about this but I dont know how to express that to you. its like being trapped in my head. I suppose in a way it is a good thing, I am often accused of saying things out of context, inappropriate and down right stupid so I figure it is also better to say nothing or very little. I am guessing there is a disconnection somewhere between mouth and brain, its either a disconnection or a blockage... Maybe its just learning from past experience that an opinion doesnt always have to be shared and neither do feelings.