What Causes Vaginal Bleeding And Stomach Ache During Intercourse?

While hooking up this past Saturday, without a condom on mightiness went into my girlfriends vagina a little bit. Like barely but still a little bit. I did not cum and don t think I had much Precut fluid. Ever since then (the past few days) I ve fingered her in a normal hookup Sunday and that resulted in her bleeding so we stopped. She experienced stomach pains on monday and general discomfort around that area. The next day, I fingered her again but lightly, figuring it wasn t going to happen again, but she bled again. She experienced the same discomfort on Tuesday. On both tuesday and wednesday I did not finger her and the discomfort was gone both wednesday and during the day thursday. Then thursday night I fingered her (had stop because of bleeding) and today she is feeling the discomfort again. Could the discomfort be because of or be an early symptom of pregnancy? What is the cause of the bleeding/discomfort? What should I do? Like I said, I did not cum so I think that she just broke her hymen or something. Her period is not due until the first couple days of December. Please help.