Toxic family member?

I’ve recently had a massive argument with my mother about me being disrespectful towards her & not showing her enough appreciation. However it’s funny because I’m always the first person of contact when she needs something, & I’m feeling as though I do a lot for her, so I’m unsure how to show anymore appreciation when I would drop anything to help family or people I care about.

We don’t live together but occasionally will go shopping together & hang out, in which she offers to buy a lot of things not just for me but for my baby (I’m 26weeks pregnant), I don’t ask her to do this & I don’t expect her to do this. But she always seems to use that as an excuse in arguments stating how much money she has splurged on me etc. With my baby shower she told me to have it at my own house but then Brought up in the argument that it wasn’t at her house, so why should she come anyway.. is this weird behaviour, I’m getting sick of having a constant roller coaster relationship. Especially being pregnant I don’t need the stress. I would love for her to be apart of my child’s life, obviously. But I also don’t want the negativity around me or my little family.

Any advice?