Suggest Treatment Numbness,tingling And Dark Spots On Foot After A Walk On Ice

Hey docs, I gotta tough situation here. It was on Friday night (2 nights ago) where I was drinking with my friends and (stupid me) I guess I blacked out and apparently I was walking home barefoot in the snow. I woke up and my foot began to feel numb and tingly with, I wouldn't say black or purple, but darkish spots on the bottom of my foot. It is now Sunday night and it still tingles and I see little white blisters on the bottom of my foot but the dark areas remain. I can still walk but it's numb to the foot and my leg kinda feels constricted as well. I have just been looking at the symptoms of frostbite and it seems I may have a second/third or maybe even fourth degree frostbite. I know I should see my doctor immediately but it's late, I have no way of getting to the hospital and I just found this website. In the meantime what should I do guys?