Bell's Palsy affects the VII Cranial nerve (Facial nerve) ; it is a motor nerve not a sensory nerve . Numbness to the lips would would involve sensory branches of the Trigeminal ( (V CN) nerve. Eye-twitching intermittently may just be muscle fasciculations.
What about Bells Palsy? Is this on one side of your face?
I agree with your concern over these symptoms- this sounds like signs of a stroke to me however, I'm not a doctor, so don't take that as it's what is happening. I'd really recommend that you call your doctor and talk to them right away about these symptoms. If you can't get a hold of them, it doesn't hurt to get to the ER- especially if it could be a possible stroke.