Sounds like she isn't being real emotionally supportive, IT. Is she acting this way with others as well, or, just you?

Her name-calling could be resentment that you're living with her.

It could be her channeling all of her other frustrations towards a safe person...you.

Then, there are also possible physical changes that may be occurring in your mom's brain. Such as dementia. Dementia - MayoClinic.com

No matter the reasoning, I am sure that it hurts. I'm sorry.

I will advise you not to bother arguing, or trying to reason, with your mom. It isn't working, and is only leading to more intense moments. Just nip it in the bud at all possible times. Do whatever she's asking you to do and then move on.

If your mom continues to call you names and follows you around ~ is there someone else that lives there that you can talk with? There could be a potentially serious problem that really needs to be worked out before tempers fly out of control.

There are many possible scenarios running through my head...Please write down the circumstances completely and let us know. I used to be a CNA at a nursing home, so I've worked with a wide variety of personalities & difficulties. I learned a lot! I also cared for my grandparents when they became elderly & needed a little to a lot more help.

Gentle hugs sent your way, IT.