Please refresh my memory here.... did you have a brain MRI, to look for MS?

The tongue and other structures of the face are enervated by cranial nerves. They are not part of the peripheral nervous system.

I looked up tingling tongue for you, and it appears to be a serious sign. If you develop any weakness, on one side of the body, an inability to communicate, head pain, vision loss, then go directly to the ER. You can search further if you want.

There are less ominous causes, such as Candida infection, low B12, eating too hot of a food or drink which may temporarily burn the tongue, or some spicey food recently. Some people allergic to seafood may have tongue sensations as part of the allergic response. Poisoning by heavy metals should be investigated too.

So if you develop any further symptoms, get checked out at an ER.