You need to seek immediate medical help with this.
Hi
Welcome to the MedHelp forum!
There are two possibilities. One is that it is due to a brain lesion. The second is that it is due to compression of first 3 cervical spinal nerves. Since there is numbness of tongue, chances of cervical compression are more. This can be dangerous if there is instability of C1 and C2 (first and second cervical vertebral joint) involved. Hence please consult a neurologist ASAP or go to the ER for proper evaluation. It may not be something so serious, but it is not possible to comment for sure on net.
Please let me know if there is any thing else and do keep me posted. Take care!