Constant Irregular Bleeding !!

I am 16 years old and I've only had ONE depo-provera birth control shot; which was dated back in January of 2013 . I was suppose to go back and get my second shot early May but after doing MORE research I chickened out and just wanted my body to go back to it's normal routine . I was irregularly bleeding on the depo-shot but I read that that is normal . I've been off for a month now & I'm STILL bleeding ! It's not a whole lot but it's like a little every day . This is TMI ; but it definitely stinks , I'm uncomfortable with my body & I'm very confused as to why it's taking this long after just ONE shot . Many threads I've read are women who has taken the shot for a long period of time but as for me I only had one shot and it's been since January . Please , please , please if anybody has an answer out there for me I'd appreciate it so darn much ! If this continues for another month I will call in and get myself checked but before that I just want to see if anybody else out there has gotten this shot once and gotten back to their normal menstrual routine . Wish I was smarter before I decided to take depo-provera , I kinda regret it since I've been bleeding . I hate this & my boyfriend hates it too ! Help , help ! Please &&& Thanks !