Is my mom being toxic?

Some background info, I wanna start with saying I’m 20 years old and I live with my mom still. This year, she said due to us being financially unstable and my age that she wanted to celebrate Christmas with only my 12 year old brother this year (which is fine) she said she wasn’t going to buy me anything and She was going to focus on mainly my lil bro. I wanted to spend Christmas with my boyfriend anyway so I asked her if she was okay with me going to his house for Christmas instead. She was fine with it. It was a deal.

We don’t have much money, and I worked my ass off and picked up a bunch of shifts at work just to try to buy my boyfriend a nice tv. She found out that I was trying to get a tv for my bf through another family member and she was livid.

She confronted me and told me SHE wanted a new tv and how dare I choose my boyfriend over her. She said I would never work that much to get something nice for her. She even keeps talking shit about me to other family members on the phone saying I chose a man over the woman who gave birth to me. I apologized to her and I told her I didn’t mean to make her feel that way and I said I would get her a gift. Even though i told her I would get her a gift and have been actively looking, she still is angry at me and is talking bad about me. It makes me feel like shit because now I have to pick up more shifts to afford a gift for her AND my bf and she’s still talking bad about me. It’s frustrating. Her birthday is also dec 8th and she’s expecting a gift then too! I’m so stressed about this. Am I being manipulated and does this seem like toxic behavior? What am I doing wrong?