I'd imagine that just about everyone here can completely relate to this statement. It's kind of like being paralyzed by indecision, I get the same thing. I'm not sure how it's like on your side, but for me when I get that way there's really not much I can do but power through it and wait for it to pass.

How many people do you share your room with? I think it'd be important to find some area you can go in your house that no one else could go. Find some good music and some headphones and just hang out somewhere by yourself for a while.

It might help for you to start to relate your house to a "sanctuary" if you could just find a small portion of it that is only yours. Unfortunately, I can see where the barking dogs is probably not something you could easily get away from.

I'd imagine what you're experiencing is perfectly normal. It's a bad age for everyone, and it's only just gotten so hard now because you're getting closer to moving out and you can see the end. Unfortunately, the stresses DO get worse as you get out on your own, but that doesn't make what you're going through any less difficult.