Another stumbling block

Recently theres been alot of drama with my oldest daughter an myself.It has probably been harder on me than her.I know this because I have never said its over child to her.She has said way worse but this is to briefly put it.She has left her husband bout 3 weeks ago again to stay at my sisters.It hurt she hadnt saw me in two months and had kept my granson away to but atleast I knew she was safe there from him.I finally got a night with my granson was awesome.Then my daughter wanted my youngest daughter who is 13 to stay the night with her at my sis house.I agreed both were to come home and see me the next day.It got put off every day for 3 days.Then finally I got word my oldest had went off with friends and decided not to come.My hope hit the floor was like a brick in my stomache.Then she returned to my sis house with the youngest the next day.They had a blow out over something.my oldest got into it with the youngest.My sis could no longer deal with the drama an told my oldest she needed to leave.She did come to my house then broken hurt an losin control.She wanted my husband and me to take her to hospital for help.We did as she asked.One thing hurtful she didnt want me in the back with her even had them ban me from coming back.I let it go an gave her privacy but that hurt she had never shut me out like that.Then when I did get to go back she was acting kinda ugly an being smart,cold to me.I let that go knowing she was having a hard time.I watched my daughter sent by ambulance to another hospital I was not allowed to go.I came home hurt an confused by her behavior and hostility towards me.I have her son so I put my feelings on the backburner an began caring for him.I got to talk to her yesterday at the hospital an still there were pop offs at me which hurt.I no the whole dhs calling thing has her upset but I have told her my reasoning and that it wasnt intended to hurt her just out of concern.I got ten fold back from her over it and out alot of money but that doesnt seem to cross her mind.Im still standing by her helping after all shes done to hurt me.I dont understand why she feels it necessary to humiliate me with such pop off and sarcasim.Its not just wrong in my opinion but disrespectful to me.Im here giving my time and freedom taking care of her son,trying to help her,plus putting all the past behind me she has caused upon me.This is what I get in return.I may have not shouldve stuck my nose in her buisness but she went beyond that in her payback.Im not sure where I go from here.I do no that I have suffered enough grief at the hands of my child yet no remorse on her part.I cant believe it im so shocked,worried,hurt,and grief stricken.Im just takin it one day at a time.I hope time heals this.I know if things keep going this way I will end up letting go of my daughter an any hope of a normal life with her.I'm really stressed an wore out had 3hrs sleep since wed mornin when i got up its now fri morning.I just dont no how to handle all this in an adult manner which is right.I keep taken this an Im gonna blow.I know myself to well.Im tired of being used just cause shes my child an I wannna see my granson.Its almost like she thinks she can treat me anyway an I will allow it but theres only so much one can take.