Turning Point - help??

So, I started having minor numbness in my feet 9 years ago, but never really bothered me except when it’s cold. Yesterday, my legs started feeling “off”, and now tonight my feet are burning and feels like 10,000 needles stuck inside them. Also, my legs are now on fire and numb up to my knees. I knew this could happen someday, but didn’t realize it’d be so sudden and ramped up! Is this normal for it to be acute versus gradual? Will it stay feeling like this or simmer down? How does anyone ever sleep or function like this without losing their sanity?? 🙁 ... any suggestions or thoughts?