Advice on Aphasia like symptoms

Hi,

I was diagnosed with Autism at 5 years old.

I used to have limited vocabulary and I have a monotone voice, I find it hard to speak and be understood when I am trying to explain something. I find it hard to find the words as an Adult now and I will say sentences backwards, say the opposite thing or even say a word or words in the middle of my sentence that isn’t associated at all and it can get me into trouble at work.

 My mouth does not feel fully linked up to my mind, I do stumble over my words sometimes and it gets frustrating trying to talk sometimes to people who don’t know me. 

Does anyone have this same problem with their Autism and do you know any therapy that helps? It’s like my mind scrambles when I’m talking too sometimes.