Delayed

ask ko lng po, mag 4 days delayed na kasi ako..pwd na kaya ko mag p.t?..im hoping for positive result kc eh?? nananakit puson at likod ko na parang dadatnan ako and kanina may unting dugo ako..tapos masakit na naman puson ko?.. we had sex po pala 3days before my due period without using any contraceptives..