<human>: Can you condense the text into a few key points?

We've been in a relationship for around 3 months, been dating for two months prior to that. We're both students - I a 4th year, she a 3rd year. On Sunday morning, we were lying in bed, and she had asked me how many girls I had dated. I told her the truth - between 5 and 9, depending on what exactly you define as a relationship, since middle school. I asked her the same, and I also asked her how many people she has slept with. She said that beside me, two other guys. She asked me the same question, and I told her that other than her, 14 girls. She was somewhat dismayed, but seemed okay. We went out to get breakfast, and she was a little quiet. Today she called me and says she wants to talk about it tonight. She's feeling upset and uncomfortable with the fact that I've slept with so many people, and says it's indicative of someone who goes through people. 

We haven't been dating forever or anything, but I really like her a lot. I'm very happy in my relationship with her, want to stay in a relationship with her and have no desire to go out and sleep with other people. What is going through her mind right now, and what can I say or do to make her feel better?
<bot>: my girlfriend asked me how many people I've slept with. That number is much higher than hers, and she's upset. What now?