What illness did I have? And why is it going away?

First I felt this paralyzing tingling sensation every time I tried to use the lap top and I was concerned because I didn't think I'd be able to hand in school work or studying for class if I wasn't able to use a lap top. Then I thought I might have some type of disease because the tingling and numbness started spreading to my feet and legs and then I wondered if I was going to die because the tingling sensation started to spread to my brain and I almost had an hallucination. Now 2 days later - it's all gone as if my health problems have corrected themselves. I'm not sure what it is but I've been on a low carb diet in the hopes of losing body fat because I thought maybe my obesity caused the problems in my body.
What illness did I have? And why is it going away?
Post Opinion