I let my dog out every night around 3:30 am and usually watch him from the window with it open so I can hear what's going on. I heard a weird noise and I assumed it was just him running around the yard, but I call for him and didn't hear him. So I go outside and investigate and it turns out he through a crack in the fence. At this point, I run back inside and get my jacket and start walking around looking for him spent the last hour walking trying to find him and nothing. I called the police and animal control but I doubt they are going to help much. 

It's almost 6:00 so the next phone call I get will either be "I found your dog"(hopefully) or "I hit your dog with my car, while on the way to work". I don't even know what's scarier him dying in the cold or getting hit with a car, both ways I'm going to feel guilty and awful.

My parents told me either he will come back or die peacefully, I really don't know what to do; searching for him anymore will just make me even more depressed and anxious and sleeping would also be the same. 

I cannot escape this nightmare.  Fuck.