Do you ever have difficulty speaking?

Sometimes it’s like I can’t think in words, it’s very strange… because words are exactly how I usually think.
Or I’ll have something to say, but when I open my mouth to say it, all the words get jumbled up, and I can’t make my point coherent.
It’s hard to explain. My brain gets all muddled up.
Sometimes I’ll even be just listening and suddenly, although I know it’s English, the words sound foreign and I can’t understand them.
What I still seem to be able to do without difficulty is read and write/type.
And it’s not all the time either, just moments I can’t pin on anything.

Is it weird? Or normal even?
It bothers me because I use to be able to ramble on and on without stumbling or slowing down often I’d get told I talked too fast, just barely aware of the idea I wanted before my tongue transformed the thought to words.

Do you ever have points of inability to communicate a thought? Or can’t understand something even though you can hear it? If so, what do you do to get your brain back on track?