I don't own a bike, I just browse these boards because I want one and I like the info you guys provide.
I had the same thing happen a few years ago. If it hasn't gone away yet go to a nuerologist right now. You have pinched your ulnur nerve. Do you also have a loss of strength in your hand, try pinching your thumb and first finger. Also is only half of your ring finger numb?
I don't mean to scare you (I'm not a doctor) but I let my numbness go a month hoping it would just heal it's self. Bad idea, I'm still not as strong with my hand and it's two years later. For example as my name suggests, I ride a Yamaha Banshee ATV. ATV's come with a thumb throttle, I still can't use one because my hand isn't strong enough. If you treat it early it can be fixed without surgury. I had surgury and I have a 4" long scar running on the under side of my elbow.
Like I said, I'm not a doctor so if I'm wrong I'll feel like an ass, but I'd rather feel like an ass than have you to go through the pain that I did.