I don't know what to do.

Okay so, I'm 15 turning 16 in 5 months. I am female and have a girlfriend, and she lives like half way around the world from me, so communication at the moment is through only a website we visit each day, but still with the time differences it makes it harder. We have been dating for a month now and yesterday she was a bit upset. My ex recently came back on the website (polyvore) and everything was fine up until she came back on. it was only then did everything flash back on me, but I've been trying to re-assure my girlfriend that I'm not in-love with my ex. My girlfriend has been raped twice and fell pregnant both times, but the first she got into a fight and lost the baby. but she's been pregnant for 4 weeks now, and I'm wondering if that may have anything to do with her being upset? I confronted her about EVERYTHING to her and basically the whole world really. even the part about masterbation. I just want her to know that I'm NEVER leaving her, because i love her too much to loose her, and i swear to god, if I loose her, then i dosen't give a damn what anyone will say, I'll kill myself. She means so much to me and can't afford to loose her.

I have recently lost my uncle mike to stage 2 cancer and a few other friends in the last few weeks. I do cut (self harm) but haven't for the past month because she has kept me so happy, but last night i caved and didn't know where else to turn, but to self harm. She was abused in her family life so i've made my solemn promise that I'm never leaving her. I won't, but if she leaves me i don't know what to do but to try and kill myself.

I don't know what to do, and i know some people may think that I'm overreacting but honestly, i'm not. She's my everything.

any help or adivse would be helpful.

thanks.