Im confused about my ex and a little worried!?

me and my ex got back together after a 9mth or so split. previous to that we had a 8 year relationship. after me being there for her when i could and us not having or any ual contact for 9 mth we somehow out of the blue got back toether i was not expecting it. it was amazing she was coming to my place which she said she never would i slept at hers we were going out everything for 3 weeks. it was amazing, then a few cracks came back from the past and i asked her about it (him) and she went cold on me, i gave hertime and just simply asked (what you doing tonight) every night for 2 weeks it was (nothing but staying in by myself and with our daughter) so eventually i couldnt take anymore of it she wouldnt talk to me about anything, and i said fine lets just forget it then. which i didnt mean. now she just wont talk to me at all apart from a small civil conversation when i pick my daughter up. now 3 weeks later i have gave up trying to talk as she has been very rude to me ---