Are These Signs Of Stress?

I’m a young teenage girl and lately I’ve been overwhelmed, I guess, with crap going on in my family/personal life. Since only a few days ago, I’ve noticed a lot of changes in myself. Here’s a list:
•My hair has been coming out in clumps all of a sudden. It never does this otherwise.
•Trouble sleeping. Very troublesome time with sleeping, which isn’t normal at all. I usually have a very easy time going to sleep and I usually sleep well, but not in the last few days. I’m fatigued and tired but I can’t sleep well.
•Loss of confidence. I don’t have much self confidence or just confidence in general normally, but it’s gotten worse.
•Headache. I have only had a very few, but I hardly ever get a headache otherwise.
•Aching. My body aches. My eyes and throat ache from crying so much.
•Trouble breathing. I have shortness of breath and have to take big deep breaths regularly but it doesn’t help. This isn’t normal…
•Changes of appetite. Sometimes I want to eat so much that I almost get sick, other times I’d rather not eat at all.
•Irritability. I’ll get so mad over something small that doesn’t usually bother me–a noise, a person, a voice, a song, an animal, a tv show, anything!!
•I want to isolate myself even more. I stay to myself a bit, but now it’s even more. I don’t even want to be around other people and I don’t want them to bother me.
•Biting my nails/cuticles/skin around the nail more. I have a habit of biting my nails, but I’ll put this clear nail polis on it and I don’t bite them. Problem is, now I’m peeling it off and biting my nails, my cuticles, the skin around my nails….not good.
•Bad thoughts. Whether it be bad thoughts about myself, like how I look, or whether it be imagining myself dead. (which is scary. I’m not actually thinking about DOING anything to myself, I’m just having thoughts about it…)
•Not enjoying anything. The things I used to enjoy, like piano, animals, music, friends, etc., aren’t enjoyable anymore. I hit a wrong note on the piano and I want to give up and throw the piano through the wall. A song comes on and I don’t want to listen to it. A friend talks to me and I want to throw them through a wall, too.
•I don’t like my family anymore. I feel like they don’t support me or care about me and I don’t want to be around them. It’s like they think I’m deaf. Well, I can hear them talking trash about me and I hate it. Why can’t they understand??!! You know?
Well, I guess that’s about it, maybe.
Oh, and I’m having some short-term memory loss. I don’t have good memory anyway but it seems worse now…
Can anyone help?? Please?? I can’t get through this alone, I know that, but it’s not like my family’s going to help any. I’m sorry…I’m just overwhelmed.