What Causes Bloating Of Stomach With A Discharge?

my girlfriend is having bloating issues. she insists shes pregnant, but we didn't have sex. my finger did penetrate, then she missed 1 period, but then had her next 2. she also took 2 first response pregnancy tests after she felt bloating and they both tested negative. today she had a discharge of some sort and she is still bloated. do you know what this could be?
she says theres no pain or anything but its kind of hard.