Counting Sheep - Tarantino Style

I had another nightmare last night. I was in a city, surrounded by people I know, and there was a man there that I knew but his face doesn't match up with anyone I know in real life. But in the dream, I understood that I knew the man.
And I was walking towards the man, relaxed and comfortable, when he pulled out a straight-edged blade and cut my arm. I remember looking at him in shock and then squeezing my arm with my hand to try to stop the bleeding. Then he attacked me with the blade and kept cutting my arms.
I was able to run away but he was chasing me. I was running down a city street looking for a police car but I couldn't find one. I stopped two people on the street and asked them for help and showed them my arms, which were covered in blood. The two people looked at me oddly and said the cuts didn't look that deep and I shouldn't worry so much.
Then I looked behind the two people and about a block down I saw the man with the blade and he was running towards me so I turned and sprinted away. I took off my green coat (all of a sudden I had a coat on where as before I had a tank top on) and stuffed it into a garbage can, because I figured the man could easily spot me with my coat on. And then I just ran. And then I woke up.

It sort of reminds me of a dream I had last spring. I was in a house and I was sleeping. I woke up (in my dream) to the sound of a window breaking. In my dream I had a new born baby sleeping in a crib in the other room. I ran into the nursery and placed my body in front of the baby, who was crying at this point. The man entered the nursery and he had a switchblade. I was yelling at him and he was slowly approaching me. I threw my arms up in front of my face and he started cutting my forearms with the knife and the baby was crying. And then I woke up.

What is with my having dreams that my arms are being cut?
It's so obvious when I have a lot on my mind.