Dreams and not a good night sleep

I am not sure why, but last night my sleep sucked I ended up waking up at 4am.

I had a brief dream that consisted of me being in a group of people. My little brother came running up to me (he was 2 or 3 at the time, wearing his light blue footie pajamas). Someone threatened us that if he moved again they would kill him. I realized I was with those people.

He then ran around again, after all he was only two. To prevent the person from harming him I picked him up and set him on his belly and pretended to stomp on him. I didn't actually impact him, I was just trying to fake hurting him so the other person wouldn't. I then picked him up and set him on his back. He wasn't moving, his lips were swollen from being pushed into the floor and I thought he was dead. The thing was I didn't even touch him with my foot anymore than I would have when I played with him, I nudge my cat with my foot harder than I touched my brother in the dream. I woke up terrified I had just killed my two year old brother. 

It sucked as a dream and it sucked I woke up so early. Today is going to doubly suck.