No matter which way you look at it, the sudden difficulty in speech must have been a sudden drop in oxygen to the brain. Maybe it was what is termed as a mini stroke which you usually quickly recover from. I would question your medication, perhaps you need something to lower the risk of strokes until they discover the problem. Have the carotid arteries in your neck been checked over?
No but will question that at my next appointment. Calling today to see if I can get in sooner because my bp was 130/97 last night and I had been laying down.