Hey my names Tom and I'm expecting my second child in mid March 2016 only there's a problem, me and the mother decided to have a child together as we were extremely happy and were planning a future together so it just seemed right for both of us. We both have children from previous relationships (I have a 5 year old boy her a 3 year old girl) I obviously don't live with my child but I have him as much as possible and get on with his mother fine where as her daughters father apparently left after his daughter was only 3 weeks old and has since been married someone else and left the country. She was worried about me accepting her daughter at first but I have and I love her like she's my own and would never treat her differently to my son. So once she was pregnant she completely changed and was distant, unaffectionate, irritable and got mad whatever I did whether it was good or bad. She's now 15 weeks pregnant and I haven't seen her for nearly 7 weeks as having me there "stresses her out to much" and she doesn't want her daughter to pick up on her unhappiness etc. we still spoke via text until a few days ago where she basically said that she doesn't want to be with me anymore even though I haven't done anything wrong and am trying to support her in every way possible. She only changed her mind to saying well maybe we can see how I feel after the baby is born once I said I wanted to come get all my stuff from her flat and the money she owed me.
There's a lot more to write down so ask questions or i'lol add stuff in when I have more time but have I been used to get her pregnant? Or does this just happen sometimes and I need to be patient? I'm currently giving her space but I'm in bits as I want a family with her like we planned. Please help??