That sounds really frustrating when the brain moves so much faster than the mouth. Its very common to need a therapy re-fresher. You will also be able to identify if your speech has stayed the same or declined. I often work with my patients to create some sort of script to educate new communication partners on their speech/language disorder to explain it has nothing to do the cognitive function.
Its unfortunate that impaired speech and language are equated with reduced cognitive function. It's really due to society's lack of common knowledge about how the brain works. It wasn't so long ago that children and adults with autism were diagnosed as being sociopaths and sent to psych wards for their whole life.