Ok so we didnt have sex put there is a small possiblilty we had some sperm on my hand then i ran it under water and wiped on a towl then i fingered my girlfriend shortly after.

Since then, that week end she "missed her period" but we did a pregnancy test using EBCertainity and it was negative, then a few days after she had a period but it wasnt as long as normal so after the weekend we did another pregnancy test and it was also negative.

2 weeks after she had a light period that only lasted a few days and now another 2 weeks has gone by and she had another light period that only lasted a few days.

Whats the cause for the short periods? is that a sign she is pregnant because of early bleeding but not full periods? we are doing another home test soon, but im getting scared. she feels like she is about to have another period