IM SCARED IM PREGANT

hi i'm 17 years old and i'm really scared i could be pregnant. my boyfriend didn't use a condom at first the last time we had sex. he didn't ejaculate inside me but i'm still scared because there could have been precum. i'm mainly nervous because if felt lightheaded and my stomach has been kind of hurting lately. i was supposed to start my period yesterday and i still haven't today. i'm so scared because i don't know what i would do if i'm pregnant. i can't tell my parents. does planned parenthood do abortions without parental consent in illinois? someone please talk to me i need to talk to someone girl to girl... :)