Who's at fault ...?

I left my house going North around 7:35 am to go to school, and it was very icy out, so I was going kept staying between 45 and 50 mph. I got 6 miles away from my house, and I saw ambulance lights about a mile ahead on the road, so I knew I had to slow down. I tapped on my break slowly, and my car swerved all over the road, I lost control, went into the right side ditch, came back out, and ended up in my lane, still facing the same way, but turned more towards the Northeast. I got out of my car to see if any damage was done, and none was done. I saw a truck coming about a mile away, so I got back in my car, so I could move it fully to the side of the road to avoid an accident. Well within about 5 seconds, the truck hit the back, left end of my car, while I was moving it, and the truck ended up in the left side cornfield. There was damage done to my car and the truck. There was a complete other lane that it could have ped in. Who should pay? I'm just looking for opinons.