Ok i'd be hypocritical telling you not to have sex at 13 so i'm just gonna be hypocritical - don't have sex at 13 or 14 or 15 and only if you are really committed to someone after that.
If you used protection then it is unlikely that you got pregnant.
All I want to finish by saying is that if you are going to have sex make sure you know the risks and how to look after yourself
before the act.
A wise person asks first acts later an un-wise person acts before asking.
If in doubt - don't do it.