How To Confirm Pregnancy Without Pregnancy Test?

I'm having what some say symptoms of pregnancy, but I'm also suppose to start my period today (supposedly, I'm quite irregular but for the past two months I've started on the same day). I am really really nervous and do NOT want to be pregnant considering I'm only 18 and about to graduate high school. Is there a way I can know whether or not I am without getting a pregnancy test or going to an OBGYN? I don't have health insurance anymore.