I Am A 46 Year Old Male. I Golf Every

I am a 46 year old male. I golf every weekend with a friend, we walk 18 holes. On Saturday I noticed that I was moving slower and walking slower. i was driving to a friends house to watch a football game and was having trouble keeping my car in my lane. I was not reacting quickly to the gradual drift of my car towards the right edge of my lane and when I arrived I could not park my car straight in the parking lot. But the big thing was Sunday morning I couldn't swing my golf club right. I was unable to get a comfortable back swing or follow through. We actually only played nine holes because of it. No matter what I tried I couldn't get the necessary coordination to swing any of my clubs including my putter. I have no other symptoms and I don't drink or use drugs.