Yep , sometimes I can't get words out. Sometimes I stutter. I get my words round the wrong way. Sometimes I put a wrong word in a sentence. And at worst , when I feel really bad I can't read things right , I can't concentrate to spell - I feel totally dumb even though I know that's not true!
Partly nerves sometimes , but my worst time is in derealisation/depersonalisation mode , urrrggg!