An awkward pregnancy situation

This is quite a lot so I will just start somewhat from the beginning. My girlfriend and I were quite happy living together. We were trying to get pregnant and it wasnt happening and we started to get into arguments about little things and then there was a miscommunication issue we had as well that ruined our relationship. Theres lot of things we both did that were really not cool and kinda mean, especially me but she did some really cruel things too. I wont get into those details but we had a mutual break up. We didnt even really have to say it to each other, we both knew. We were supposed to take a trip to the national rainbow gathering in Montana this year but we had mutually broken up before that happened and we were not spending time together and giving each other space. I initiated contact (nearly 3 weeks of no contact and a little over a month after the break up) while she was traveling to wish her a safe return home (to my house, where she lives) and to kinda talk about nationals. Well I let it slip that I wanted to start things over and try the relationship again. The thing is, we are great together. We get things done and we feed off each others energy. We both have lots in common (though we are two different kinds of people in a way..) and share many of the same dreams and goals. After I told her I wanted to try again she said she did too. After we broke up she got with her friend who I will admit I was slightly jealous off, not of HIM, but of the things he was offering her to do with him and that is a part of our break up among other things. I guess she only "dated" this guy for maybe a couple to several weeks before he broke up with her which was really random and it happened through a text message while she was in Montana at the rainbow gathering and basically said were done this and that im moving out of state, nice knowin ya type of thing. So now she is back at home with me, sometimes we sleep together, sometimes we dont but she has her own room now because i kicked her out of my room when we were fighting. We talked about it a little bit and it was hard for me to listen to her tell me all these things about the guy she rebounded on me with. Weve had sex together once since shes been back (for 4 days now, last night actually) and weve talked about our relationship issues and why it didnt work. I think were both willing to try again however she still needs to heal emotionally which im ok with. Today was a decent day with her and we talked about things and i heard her screaming for me and crying so I ran up to her room thinking she was hurt or something was wrong with her daughter and she hands me a positive pregnancy test. She said it may or may not be mine but its probably not. I have no idea what to do... She is extremely vulnerable right now not only because of the things ive done to her in the recent past but because she is now pregnant again. She is about to turn 20 very soon by the way so she is young and got pregnant when she was 16 too. I want to be with her, I would like to rekindle our relationship. Im fairly certain I can do that on my own but I need some advice as to how I should handle this situation. I love her but I dont want her to think that if the child isnt mine Im not going to love her or her children anymore. I would like to be in the relationship for the long haul so honestly I dont really care if the child is mine or not. If it is thatd be great but if not oh well and im not even sure I can have a child of my own anyways.... I dont want to leave her, I dont want her to leave me, and I dont want to push her away by trying to talk out this pregnancy thing either. This guy she was "dating" for those couple to several weeks just texted my phone and said "look, im making you the offer to pay for the abortion. if it comes back as mine or whomever. but if you go to term and keep it 1 of 2 things are going to happen. 1 its not mine and you have to track down whos it is. 2, if it is mine, my family and i will do everything that is in our power to have you found as an unfit mother and i will take my child and raise him/her as i see fit. you do not want to go this route. ive already spoken to my mother and she is in agreement."

Complicated. Go to a relationship counselor together. Decide if you have what it takes to make it work. If you can't commit to the counseling cost and time investment, you have no business committing to a relationship. The child is innocent. The greatest gift a man can give any child he is raising is to love it's mother. The bio father will always have a right. If it doesn't matter to you whether it's yours or not, and you love the girl, don't do the paternity test unless there is a medical reason you have to. Raise it as your own and "assume" it is yours. The child deserves that.