Wrong Use of Power and mental harrassment

Hi Sir, I am a software engg. in one of the MNC, currently just an experience of 1 year 9 months. Few months before one friend(girl) was in need of a new project coz of some previous project issues, and I referred her into mine and she joined here. We were great as a friend and colleague, but there were some fight which were personal nothing related to corporate life. Just yesterday, we had a chat in office over a communicator which our company provided. We were fighting in that conversation, in which I wrote something which was personal and like "I regret to help and bring you into my project so leave, get out from here. etc " and some thing more which was personal, I wrote this in anger. Now she instead of sorting out with me, she saved the chat and took it to my manager and one-over manager. We all had discussion and i agreed my mistake what I said was wrong and I feel guilty about that, what ever was written in chat was because of my anger and I was sorry. I apologized that in front of everyone. This was closed yesterday. Today she took this issue to another team's manager who is a woman and she fully support woman for each and every case. Now the another team's manager has good higher level contacts and I have seen, this girl has intention to make me survive and make me loose job. I am working for 1.9 yr in this company as a fresher, so hard, as my team and mangers are happy and have initiated my VISA for onsite. Now my job and future is at stake. At such level this girl want everything I've earned to be taken away. I need some help and advice what should do now. When I did that mistake, i agreed and apologized, but was it necessary to take this to some other manager ? I never expected this girl who was my friend will take this huge step to destroy my future. Now within a month I am about to travel onsite(UK) and I can see its about to get cancelled. She is using this issue as a weapon and whatever women's reservation and power given, she's misusing it. Please help me to resolve this problem.