What you're in desperate need of is some accurate information. It’s quite possible you’re pregnant—in fact it’s probable, given that you’re having unprotected sex. I’m wondering if you have a wish to get pregnant? If so, you’ve probably got your wish.
Condoms are widely available in every drugstore, as are contraceptive gels and creams. And there are many other forms of birth control that are available without a prescription as well. I urge the two of you to go online to the following site and read everything about risk reduction. This is a great site with lots of good information:
www.scarleteen.com
In addition the MedHelp safe sex site also has lots of good information:
http://www.medhelp.org/medical-information/show/1723/Safe-sex-
Your next step is to use a home pregnancy kit for a preliminary determination of whether you’re pregnant. If it’s positive or if you continue to have spotting and other symptoms such as breast tenderness, make an appointment at your school clinic or at your local women’s clinic.
If you're old enough to be engaging in penis-vagina sex, you're certainly old enough to take responsibility for birth control. So take the bull by the horns and get on with it. Best of luck to you. Dr. J