Flexeril and tingling and numbness

I posted on July 27, but have to amend my complaint. The flexeril was definitely not effective for me, but the good news (for others taking Flexeril) is that the tingling and numbness I reported was due to the sudden withdrawal from another prescription drug, and not caused by the Flexeril.

Prescribed Flexeril 10 mg/3 times a day for back and neck pain and stiffness. I had no relief with one tablet, so yesterday I took 2 tablets at noon, then another tablet before bed. Today my muscles are looser, but I have a strange tingling and numbness sensation on my left side. It's affecting the left side of my upper and lower lip and face, left shoulder, left arm and fingers and left leg. It's not painful but I am a bit scared. The pill should only last 4-5 hours and it's now been 10 hours since that last bedtime dose. So why am I still feeling this effect and when will it go away? And I am supposed to take 3 a day for a month?! I am not sure if I will be taking anymore.