Anxiety and Stress due to work from home

I am an investment banker currently working from home . Till July 2020 I have was successfully able to manage my work from home through the help of my extended family but post that I am facing burnout, anxiety attacks and focus related issues at work. Also I am a mother to a 2.8year old kid going through his terrible twos stage. Handling the emotional needs of my little one and balancing my work has affected my overall mental health. I have been scolding my child lately a lot  and  going through the mommy guilt which has had added injury to my overall condition. I have been working out, taking a break and other possible things to stay positive. What is worrying me is also that I am due for a promotion this year and I do not want to lose it due to the issues I am currently facing due to the pandemic work from home set up. I am even contemplating of quitting my job sometimes when the stress hits it's peak! Hoping to have a helping response!