Need an expert advice.

When I removed the condom after having sex with this girl from college,I noticed a few drips(not sure if it's the semen or her vaginal fluid) from one side of the condom(I checked the other side and it was dry). Immediately I told her about this and urged her that it's better to take e-pills.But she's taking this in a light tone and brushed my concern off like it's nothing.I am kind of anxious about this situation and called her again and again to do the necessary after she left home.She doesn't seem to care at all.I rechecked the condom again but there was no visible puncture.But still I am kind of thinking about this since the incident and the fear doesn't go away.
How should I deal this?