Suddenly cuts out

Today I am experiencing, the feeling of nodding off to sleep, I can be minding my own business and off I go, next minute I jump awake before head butting the table. This I see as a good thing, it probably has something to do with my brain stem and has happened aour 20 times ths morning. My top half must be in a more relaxed state, whih is so good, things are starting to happen, straightenng wise, so its all good.