Okay think my problem is solved. MOm got home and took flashlight out and shined it on the wheel....yeah aparantely it did come off. It sitting against the wheel b/c you can see it against it.....mom said doesnt look like much and I dont think the wheel was damaged bad. I didnt go far. I think I backed up like 7feet or less and pulled it in the driveway, anyways.....
I had a friend of mine while back to put my brake shoes on b/c I didnt have really much left (have the old brakes I kept). The next morning I went to the car to get ready to leave and noticed this big screw. At first I was like $h!t he forgot to put this on my car, but yet it rained so I figure it came from the junk pile next door. Mom said I was lucky tonight to not have gotten on the road when it happened, I could have done more damage. But I'm gonna call this place in the morning and ask if they can tow my car and fix the problem.
I'm still not sure about the wheel, if the caliper might have cut into it or not. Yeah, I have a small hose with slits in it, gotta replace that and the other 2 hoses to be sure that nothing is wrong with them. Had to add some oil to my car today as well. See I know I need muffler and hoses. That was going to be it, but now I have this problem to worry about. Looks like I will be driving mom's truck til its fixed

I have been driving my car for weeks now with that brake problem. It could have fallen off anytime, and I sometimes take interstate as well. Thats scary.