Suggest Treatment For Numbness And Tingling In Hands, Tongue, Lips And Feet

I have been experiencing some weird symptoms. my hands, tongue, lips, and feet are somewhat numb with a slight tingling feeling. It started about 5 days ago but has slowly increased in its severity. The numbness of the feet started today. I spoke to my doctor about it briefly, however she said that it is most likely a combination of stress and a poor diet. I personally have never heard of such symptoms for stress. She recommended i take B-12 however, it made me somewhat nauseous and jittery. I am a 17 year old senior in high school. I currently work on two seperate health offices. One of which i am constantly typing and going through paperwork. The other i am reducing patient charts by hand. I dont have insurance so i am hoping it is nothing severe but i would like to treat it the best i can. I have a history of kidney infections, and was diagnosed with bipolar disorder and insomnia however i do not believe that has anything to do with it. Could you please give me some advice? If you need any more information, please feel free to contact me.