Tell the truth, even if you think you will get in trouble for it. You will gain your parents trust back much easier that way.

 He already knows. Stop stressing and just bring it out into the open

 Be proud of yourself, keeping the baby is the best decision you've ever made. don't let other people's opinions make you second guess yourself.

 Make sure to use your brain at all times. Remember some mistakes can not be changed, but you will always learn from them.

 Wear your retainers.

 Don't let him abuse you...ever

 You're not straight. This realization, in high school when nobody else around you is out, will suck. And then you'll go to college and meet the girl of your dreams, and then it won't suck any more.

 It's gonna be tough, but you're gonna be ok. That girl you keep hoping you'll be when you're older is here. And even now you're still kicking my ass to be a good person. Love yourself, you're a good kid and you know it.