Why Does My Mom Constantly Argue and Push Me Away?

My mom and I have a hard relationship that I could never explain, she always starts arguments with me every single day over what ever she can think of and every one notices it and don't understand why? bc it just don't make any sense the way she acts towards me? (they say she is jealous of me from what they see) It just stresses me out bc I try so hard and how could you feel that way towards your own daughter? She just pushes me away and puts me down. And even today she managed to start with me all bc I didn't talk to her soon enough today......but at least I did talk to her and tell her happy mothers day hell today is not easy on me..my children are no longer with me. I have to visit a grave to be with them. but shes the type that acts like its harder on her. :(