Why can't I talk properly?

Last night i started getting a blurred vision so I tried to sleep it off... I didn't get into a sleep but when I arose from my bed I had a hard time processing words.. I would speak and it wouldn't make ANY sense... nor could I type properly.. I could read just about but nothing like I used to, I then got a pins and needles kind of feeling on my right side of my body... half of my tongue, face arm and legs. I went to bed and woke up fine. Will it happen again? What is this? Thanks in advance.