You should always see a doctor if you suspect a stroke. Changes in speech, ability to walk, sudden numbness and paralysis on one side of your body, severe headache, confusion, and visual changes are all signs of a stroke. Go to an ER if you experience these things. You should go to a doctor. A CT scan can rule in or rule out a stroke. It is worth a look see.

Was it temporary? Did you have the pins and needles feeling? And, most importantly, did you sleep in a weird position. I know that I've woken up in the morning with a numb arm and side of my face if I sleep funny.

If it stayed numb for a prolonged period (I'd say more than 15 minutes), there's something more that's going on, and I'd suggest seeing a doctor. Especially if it's prolonged or recurring.