Am i doing something wrong ?

I'm 27 weeks with my first child and I'm 18 years old I had a job but I stopped when I was 5 months because I was having some issues and my mother told me that I did not have to worry about working fast forward to now she's always yelling and complaining about how she's stressed about caring for my child 😐 he isn't here yet and she hasn't even bought him anything i plan on moving out and getting my job back as soon as he's old enough and she knows this so I'm not understanding how she's stressed about it ? I dont ask for anything my grandfather and boyfriend help me out and get me what I need the most she has to do is pay the light bill which she would be doing anyways me being pregnant or not so she's not strapped for cash I really think she just wants me to feel bad all the time🤷🏼.