My ex wants to limit my visits with my child

My ex and I separated when my daughter was about a year old. Although our relationship at times have been tense, we managed to agree on custody and child support without the involvements of the court.According to our agreement I was to pick my daughter at day care on Monday and Wednesday and return her to her mother's house by 8:45pm and she will be with me either from Friday to Saturday or from Saturday to Sunday.Now our daughter started at her public school on September and my understanding was that she was doing really well, with some minor adjustments. In the pre-K were she was before it was less structured than her new school and she's still adjusting. But everyone at the school always commend her and tell me how smart she is (she knows how to read and write and she is bilingual).Anyway, out of nowhere my ex tells me that she wants to change the schedule because in her opinion the commute from the new school to my house (I'm 25 minutes away) is too much and the hour she spends on the road on Monday and Wednesday is "too stressing" and is affecting her adjustment at the new school. Instead she wants me just to see my daughter during the weekends.That came as a surprise to me, because so far the only thing I've heard from the school was that some other kid that was upset hit my daughter. Today my ex told me that my daughter hit somebody, that she was throwing stuff at other kids and was basically being unruly. I have not heard from the school about that, and they have been able to reach me on the phone whenever they need to.I told her that she's getting ahead of herself and that we just need to give our daughter some time. Even though we have always dealt with disciplinary matters together and with one voice, for the last couple of weeks she has been avoiding me (not answering phone calls or texts). She's complaining that she's overwhelmed, but she's keeping me out of the loop and rejecting my suggestions that we deal with our daughter as we've been doing for the last four years.I treasure the couple of hours that my daughter spends with me two days during the week; we read, we play games, I make her dinner and talk to her... she likes to write and I've taught her to illustrate stories with crude drawings, which she enjoys a lot. I taught her Portuguese (my side of the family is Brazilian and she understand them really well). She will start getting homework from school this month and I want to help her with that the same way I've been doing when she was on pre-k.I would appreciate your take on this. My ex insist that it will be only for a few weeks, but I'm afraid that will not be the case and she'll want to make this into a permanent arrangement. via /r/Parenting http://ift.tt/2xR1d5D