What does this dream mean?

Last night, I had the wierdest dream. It was kinda like 28 days later. I was this father living in, Britain and as this plague started with all the zombies and stuff, I thought my son got sick so I hid out in this old abandoned house with a couple other people in the middle of London. But my kid (I'm a teenager, I don't have a kid) turned out to be OK, so we decided to leave and head out into the countryside as everything fell apart. The zombies could run and but were super stupid at times and we just walked past them and they didn't even flinch. We got into a small town that was being sealed off by the local cops and militia. They gave me a shotgun or something and put me on the edge of town with some other guys protecting the main entrance in. Then this zombie elephant came along and we were all shooting at it but it didn't die so I panicked and ran. I heard the shooting stop and turned and saw the elephant was dead and me and my kid (which I dont have) was thrown out of town. Then my dream skips to a few months later. For some reason me and a bunch of people (including some younger kids and a really cute blonde chick who isn't based off anyone I know) were repopulating this area of London. For some reason, the zombies could talk and were starving to death. They were getting better or something. Also, it was stupid because none of us had guns or anything. My kid was the one with the pocketknife. Anyways I talked to one and it seemed reasonable but the another redneck zombie tried to attack me and I jumped into the harbor (this part of the dream was set near the River Thames.) Anyways, we all got to the safehouse and somebody was like, yeah i'd like to live here. Later I was fixing up my room when suddenly the place is attacked by like 50 zombies. I tell my kid, hey get over here and then a zombie runs in and I pin it against the wall where my kid??? stabs it. Then we hide in a washroom and hear everyone including the girl pound on the doors and demand that we open it. Up until then, the dream had been kinda sick but now it was just messed up. Then there was a whole of screaming as zombies broke into the room and they I woke up.