Hello,
You need to be seen an ob/gyn and examined. I don't know where you live to recommend where you should go. A good place to start would be the student health services center on your campus, or an area Planned Parenthood.
Best regards,
Dr. Downing
Good luck hope it isnt too serious.
Otherwise if you have to go to the gyno on your parents' insurance, can you just tell them you want to start regular routine checkups or something as a reason to go? The doc can't tell your parents why you are there, what tests they run, or what the results are if you tell them you want it to be kept confidential. Either way, i'd definitely get it checked out if for no other reason than your own piece of mind. Good luck!