Hello BabyCakes

I feel your pain. I'm 25 years old. Throughout my college years, I had pretty bad depression. I had racing thoughts, I would get nervous, and most of the time I'd be able to control my anger, but because I was so upset with myself sometimes I'd get this RAGE! I'm 25 years old now and am at peace with myself. Here is what helped me to turn my life around.
1. I started exercising more. Exercising gives you a high and it naturally starts to make me feel better. The body releases endorphins which supposedly make the brain feel happy.
2. I've turned my life over to God. If you are an atheist I guess this can't help you! I was never very religious but then I read the book "The Purpose Driven Life" and it opened my eyes and I truly discovered my life's purpose. I put ALL my trust in God and now I don't worry anymore about the past (hey, you can't change it, why worry about it) and I don't worry about the future (it's not here yet but what is here is the PRESENT, you can better yourself right now). If you are atheist that's okay.
3. Meditation. I focus on being in the present and to focus on my breathing whenever I feel my mind is racing. Breath is the key to life. It draws you back to the NOW. It's hard to initially meditate but it's kind of simple. A book to read to help you on this : "Wherever you Go there you are" by Jon Kabat Zinn. Great book! (another great book is Don't Sweat the Small Stuff...that helps with the anger problem, I think)
4. I make a concerted effort to connect to people. I'm not the most outgoing guy. But I find that by smiling at all people and just saying hello makes me feel happier. Smile right now. You'll feel better.
5. Control your thoughts. Happiness is contagious. Happy thoughts give life to other happy thoughts (easier said than done, right?!!!).
When all else fails, get right back up again! Life is very hard. It's not meant to be some big party where you are always having fun...you'll encounter problems but it's good that you are trying to find the root of your problems. Everyone has skeletons in their closet. You'll be just fine. Heck, I still get REAL depressed but sadness is a part of life.... Just make an effort to be happy. Your happiness is worth fighting for. All is well. Message me if you'd like to talk more about your problems...I'd be GLAD to help