Can severe depression/anxiety/ocd cause dementia like symptoms? two episodes of word salad from me and im only 27?

Yes, emotional dysfunction can cause secondary cognitive issues, especially if your sleep pattern is poor secondary to this. Contact a therapist, and deal with some of this via cognitive-behavioural approaches. A psychiatrist may well be useful. Some blood tests should be reassuring. Highly unlikely you suffer a true neurological dementia at your age.

Please see a Clinical Psychologist with expertise in multiple types of psychotherapy to help. You may need medication managed by a Psychiatrist. You may also need a physical exam to rule out any illness causing these symptoms.