So, I'm worried my girlfriend may be pregnant. I'll cut to the chase. Here's how it happened.

Me and my girlfriend were fooling around the mornings of Tuesday-Thursday last week (6/9-6/11?) and over that time, I ejaculated 4 times. Only one time I'm worried about, other three I'm positive she's fine. We were in the shower, and I ejaculated, but I'm not even positive any got on my hand. Then I fingered her (possibly with my other hand, can't remember). I wiped my hand off too, in the water. Now, on 6/14, a Sunday, she's telling me she's having abnormal symptoms, two days before her expected period. Spotting, bloated feeling, headache. I feel like there's no way she can be pregnant, but these symptoms worry me. Any ideas?