My Girlfriend is killing me on the inside, what should I do?

My girlfriend and I who have been dating for a very long time now recently had a pregnancy scare. The week we spent not knowing had us both absolutely terrified out of our minds but I promised her no matter what happens we would make things work out, even if I had to quit school and go get two jobs just to support her and the baby. (By the way I know this was all incredibly stupid of us so please no lectures :P )

She took the test and it was negative. A few hours after that she got angry at me and refused to tell me why. She was going on vacation the next day so, determined not to let her leave with those kind of feelings I ran back and told her I loved her more then anything and that I was gonna miss her so much. She didn’t reply but just walked away. Then just before she leaves the next day she sends me a text saying she loves me too and is gonna miss me and we exchanged many a mushy message (I’ll spare you and skip all that :P ) So she goes on vacation and gets back two days ago (from today.) When we start talking she goes on about this amazing guy she met while gone on vacation and she seems to talk to me different, almost like she doesn’t at all want to acknowledge me as her boyfriend. She seems extremely distant and I don’t know what to do. Its scary that just before she left we were getting on alright and everything seemed much better…

The way she’s talking to me now is honestly killing me inside and I don’t know what to do… I have the feeling if I confront her about it we’ll only get into another fight. I’ve tried giving her space but that only made everything worse. Any suggestions on what I can do?