Triggering: Need Some Help

[Alergnon]

I'm in a predicament and need some help. There are a few that I need help with in the situation(s). Not sure if it fits in here.

1) There is this guy (don't want to sound cheesy), well I posted this thing on a site but it has to be reviewed before it's answered or live on the site. (It's a self-help site, they help people and they have a chat service.) Well, I told my guy friend to not read it and I gave him the title so he would avoid it. Well, he first told me he couldn't keep that promise, then told me he can keep the promise to not view it. First thing I want to clarify is, I never wanted to share this site with him but he went all suicidal on me because of me. So I gave him the site so he would shut up about me causing him problems. Well anyways I got pissed off and I sent an e-mail to the site asking them to take it down for me. That I didn't want help anymore on that particular issue. I hardly talk to him anymore. Deleted him off facebook and he is so sorry, too late.
My question is: Was this a smart move? Did I do the right thing?

2) I'm at home for the holidays and I'm sick of it. I've been out on my own since I was 16 10 months old and ever since been in a group home then into a homeless shelter and then on my own. So, I'm done for another few more days and my parents are moving tomorrow, so there is a lot of arguing and disagreeing and yelling. I'm sick of it. They're stressed so therefor I'm am stressed out. Not only that but my brother is verbally abusing me. He's 20. My father on the other hand calls me an idiot and verbally abusing me as well. My mom on the other hand is venting to me about all the issues and crap from this "big" move their doing. I'll just be happy when I'm gone and back to my place. Another thing is all my past crap is coming back because I am here, so when I go back to my place I'll have access to anything and everything to hurt myself with. I already tried breaking my razor my mom gave me. Instead I broke a piece of plastic and cut with, caused a massive bruise.
My questions are: How can I cope better once I go home? and How can I deal with all of this?

3) I keep hallucinating and it's starting to bug me. I keep seeing dots and shapes. I also see my dog Midnight, he past over a year ago in this house (parents house) and I see him and I almost yell "Midnight" but I don't. What's with this? Am I going crazy? Should I tell my doctor?