TeenHealthFX hears that you are scared and is glad that you wrote. Believe it or not, many people have experienced symptoms like the ones you are describing. Although we can not diagnose you over the Internet, we can tell you that bleeding from your rectum could be a result of a number of things - hemorrhoids and colon problems included. Have a look at our answer to Butt Crack Bleeding for more information on these and other potential causes.
We know it is not easy to talk about issues like these, but what you really need to do is see a doctor who can diagnose you and help you to feel better. Even though it may feel embarrassing to talk with your doctor, these are important issues for you and your health. Doctors are accustomed to listening to all sorts of symptoms - they are trained to listen to your concerns and to try to discover what your health issues are. Telling the truth about what is going on in your body is essential in order for your doctor to help you. If you live in northern New Jersey, you can call the Adolescent/Young Adult Center For Health at 973.971.6475 for an appointment. If you live outside of Northern New Jersey, please call your local Planned Parenthood.