Hello mam, me and my girl friend mastuburated (deep fingering) on 4 April but we remember there was no pre-come or sprems in contact. In 27 th april she need to have her periods but periods didnt happen. after a week and 2 week later in tension we did home urine pregnancy test but result was negative. On very next day 15 day after period delay she had bleeding like period but only for 1 day. Now we are getting tensed is she pregnant or its just stress which is delaying periods?? She is still having back pain like she has in periods .. Please guide us what to do...