Parklife, welcome to the forum where we do understand where you are coming from. However sorry you have found it necessary as its a very hard thing to cone to terms with.
Some people posting on here recently, have been purposely cruel. There is no such person as a perfect mother or child for that matter, we all put our foot in it sometimes, perhaps thoughtless but never with a desire to hurt. I have never met a mother that didn't love their child even when that child is being a nightmare, the saying, hate the sin, but love the sinner sums it up sometimes. For some reason an adult child has decided that mother/father must go instead of talking about their grievances, real or imaginary. For some of us estrangement has been years with no hope. I tried for many years, almost begging my daughter to tell me what was wrong, all she ever said, was that I got on her nerves. I carried on sending cards, presents, which I found out we're binned, wrote letters, until in the end I just gave up and faced the awful truth that she really wanted me out of this new life she had, I just didn't fit it. Although I did in the end, leave her in peace, the price to my health has been enormous, how I wish I could not care, even after all these years, I still blame myself for failing but I don't know how. Coming on here has made me look outside my own position, I hear other people bewildered like me and hurting,and whilst wishing their relationships could be sorted, know that I am not alone, neither are you, because we understand. It is early days for you and perhaps your daughter will get in touch. Many years ago a friend of mine went 18 months without speaking to her mother, her mother never made contact in that time, the old school, but the daughter eventually did and they were closer than ever. Every situation is different but we all hurt the same.