hi there, no point freaking out ,just relax. If you did have unprotected sex then there is a possiblity of pregnancy
even tho' she has been having spotting. What you need to do is to ask her to collect her first morning sample of urine and run a urine preg test. If that is positive then you need to talk to your elders and take an informed decision. Till then do not panic and go about assuring that things are fine in a systematic manner. Take care.