<human>: So my girlfriend and I met about 6 months ago at a college party and since then had been hooking up with at least a little bit of feelings until we started actually dating about 1 1/2 months ago. One drunk night a few weeks into the relationship she asked how many other girls I had been with and I told her she was my 8th and she told me I was her 4th. She burst out crying and getting upset telling me things like "Why would you do that?". Carrying forward I talked with her about it, saying I felt it was in the past and how her other partners were fine with me because I care about her, and that her previous relations did not matter to me. 

Guess I should also say this is my first serious relationship, and we are very recently doing long distance for a bit until school starts up again.

So anyways since this time, she will randomly think about it and get very upset and kind of get quiet and not want to talk to me because she is upset and mad thinking about it, although she tells me she is not mad at me. However she does get kinda mad saying "I guess you don't understand." or things to that extent and is mad at me feeling there is nothing that can be changed in our pasts so while worry about it.

I am just wondering if anyone has advice for how I should try to either keep her from thinking like this, to calm her down, or just what to do about it all. Thanks

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: She is my 8th partner, I am her 4th. After learning this she says it is driving her crazy, and tells me things like "Why would you do that?" with little things randomly setting her off. What do?