depending on which city you're in, just google up "____ city prosecutor" and call their office. The charges might not be filed yet into the system since it could go through the detective system, but go ahead and call them periodically to check up.
Best advice I can give you is stop worrying! You need to put this behind you and move on with your life! I know it's hard now but give it a couple of days and you'll feel a lot better.
Hope I helped you.
I'm addicted to checking this forum.. lol