Wow. I'm terribly sorry for taking so long to reply, but I've been really busy and my computer wasn't working. I've read everyone's suggestions and comments carefully, and I appreciate the help everyone was willing to give me.
I borrowed a trumpet from a friend this week. I'm ecstatic to actually have a brass instrument in my possession to practice and work on, because it's like I'm another step closer to achieving my dream. It's going to take a ton of work though.. I plan on getting a trumpet fingering chart from my band director in the near future and just working out every single note.. so far all I've been able to do is lip slurs, the concert Bb scale, and long tones, just sitting next to a tuner and checking my pitches.
One of my trumpet-playing friends found it odd, though, that it's really easy for me to get high notes out. I can get some notes above the staff out with little difficulty. The lower octaves are killing me though, they sound terrible. Is this a bad thing? I know it's one of those things that will take a lot of hard work, but does anyone know any ways to improve my lower range?
Thank you all once again for actually responding to my questions and helping me out, it's definitely appreciated.