A few days ago, I stepped out of my car and felt a piercing pain in my foot-- more like my toes. A piercing, cramping. I was wearing new flip flops. I kind of massaged it out, but still felt pain/discomfort. Kind of limped my way through the grocery store. Just yesterday, I discovered that my two two (the smallest and the one next to it) are numb and tingly, like when your foot falls asleep, when the novocaine from the dentist starts wearing off. Now, the sensation has crept up my leg-- no so much the numbness, but tingling. Is this something to be concerned about?