Hospital. No don't wait. You like your foot Yes? I mean perhaps you're not in love and worshipping of it but I assume you wish to keep most if not all of it right?
Right... Hospital. Yea it sucks,believe me ive had to go to hospital in similar situations. Recently I was taken into the hospital in handcuffs so the cops could make me submit to a drug test. I remember when the doctor was going to draw some blood and he asked me to look away while he jabbed me and I just looked at him kinda dumbfounded and said something along he lines of "you do know why im here right? And why all those cops are waiting outside right? And why that female cop followed me into the ladies room while I gave a urine sample right? And what the request form says to test my blood FOR right? Not to mention the obvious track marks. I'm an iv heroin addict you really think im gonna freak out about you taking some blood? Just do it already.".
So yea, hospital, now. It'll suck a lot less than losing part of your foot, or all of your foot. Or your LIFE. Don't think that last one is impossible, I know a young woman who died in a similar situation nearly half a year ago. I hope me and everyone else have made their point. Do it, no hesitating.