tannith
first off, if it's possible you were sexually assaulted, you may want to go to the police about it. i realize that you don't want your parents to know about this, but if something happened to you against your will, then you will need the help of the adult world to catch and perpetrate the one who did it to you, not just to bring him to justice, but to make sure he doesn't do it to anyone else. the usage of date rape drugs in this scenario is particularly disturbing. of course, that's just a suggestion. you're young and this is probably hard enough to deal with, especially since you'd probably rather just not face it. however, the sooner you take action, the easier it will be to get results.
as far as home pregnancy tests go... you're a minor yet so unless you go to Planned Parenthood (use the bus much?) or get a friend to drive you, i think in general if you went to your normal doctor they would have to tell your folks. but in general it might be better to just come clean with the whole story to them... they might prove to be more helpful than you think. i don't know your parents and can't gaurantee it, but, if it went down as you said, hopefully they'd understand you need their support right now, especially since it was a circumstance beyond your control.
i've lived a lot of my life in fear of things going to happen, but in general, i've found that the fear is worse than when the bomb actually drops. relieve yourself of some anxiety and come clean unless you really think they would harm you or kick you out.
AMEN! i totally agree with this guy. there's nothing for you to be ashamed of since it was possibly rape, and definitely not a willful act. there is no embarassment in telling your parents this since it was not your fault. though, i don't know your parents and can't
really be sure, i think any normal parent would be very understanding and supportive in such a situation as this. go to them and tell them first that you think you might have been raped. give them that whole story first, then tell them that you think you might be pregnant. i'm sure they'll understand.