My Pregnant Partner Is Moving On?

I have been under a lot of stress recently. I met my new partner over a year ago but we had been friends for a number of years. We used to work together. We got together at the end of last year. My girlfriend was virtually bankrupt and on the brink of nervous breakdown and had a drug problem (speed) I managed to turn her life round. She had two children by a previous relationship, one that ended in bad cirstances. I looked after all of them her and her two Kids. We emigrated at the end of lastyear to a foriegn country where her dad lives. I lived there for four months and had to return to the uk for personal reasons that I couldnt avoid before this my girlfriend got pregnant. I left she was hormonal and suffering from the hear tired unable to sleep tec. I returned in September. Since then she has been moody aggresive tried to flirt with other men and even try to rekindle her past relationship with her ex. This is not her normal behaviour she is due in March. I dont know if there is anything worth saving to be honest. But I want to try as despite everything I have left her on her own for four months. She refuses to talk to me or take emails she has pushed me away ever since she has become pregnant. I feel I have done everything I can to support this women, we have rowed recently and she has informed me that this can not work as a relationship. But I dont know if there is anything I can do. I feel that the situation I am in has not helped with her being on her own. We had a row in October where she basically has told me that I should start a fresh and that was the end. I have tried to contact her on several occasions only to be ignored. I know she is reading emails as I still get the read reciepts. I have tried calling only to have the phone put down on me. I had an email wishing me a merry christmas and a happy new year and nothing else. I feel I have lost everything as she meant the world to me but I reached a point where I also need to look after the babys intersts and mine as well. I have no idea if this will change once the baby comes or if this is perminant has we have rowed before usually instigated by her I try not rise to the bait. I dont know what to do. The last few months have been stressful for both of us, on both sides hers more as she has pretty much been alone