Can severe anxiety/ocd cause spontaneous aphasia and garbled speech? episode where my speech was so garbled and random it is alarming family members. im only 27?

No. Severe anxiety/ocd can't do that unless it was actually an episode of psychiatric illness rather than a true organic disorder. It sounds more like the sort of thing that happens with migraines or (much more rarely) seizures. You may need referral to a neurologist. (You realize that all this is guesswork, right?) Question: Do you really have diagnosed OCD for which you are being treated?