I'm 15 and was having sex with my boyfriend of 10 months, but we have recently split up.
There is always a chance that you could be pregnant if you have had unprotected sex. It would be worth doing another test and you can get this free of charge at a pregnancy centre on the web site or at a contraception and sexual health clinic (CASH). If you need details in your area ring 0300 4000 999, or NHS Direct. Even if you are not pregnant I would advise you to go and talk to your Doctor or local CASH about contraception, and getting tested for sexually transmitted infections.