I've been in a situation before when I had to go to the hospital for something similar. I had been shooting coke all day and night, and I couldn't hit anymore veins. I had a tie around my arm for so long that the blood coagulated and one of my veins got really fucked up. On top of that I had been using an old rig like a moron and I got all infected too.
I live in New York, and when I went to the hospital, they did not call the cops, and I did not get into any sort of trouble. It's a real good thing I went too.
The way I see it, you shouldn't really deprive yourself of help if you think you might get in trouble. Getting arrested will not be as bad as losing a limb, and man I've seen people trying to inject into their stubs, its not pretty.