Me and my girlfriend took a clear blue pregnancy test because she's been experiencing all the symptoms like itchy tender breasts, fatigued, and unusually hungry at times.. she says it would be about 3 weeks along but it kind of looks like she might be a little more along than she's saying.. I tried asking her and she wasn't the happiest camper in the world so I let it alone.. anyways is there anyway I can tell if the baby is mine before its actually born?