Burned out at work

Hello! I’m feeling so tired and frustrated with my job. Sometimes I have a lot of flexibility, get to drive most of my own projects & my own schedule, and enjoy the work, but the last few months I’ve been working on weekends and long days just to get everything I’ve been asked to do finished. I don’t have the same flexibility and autonomy that I used to have (in part because I’m working with a new contract & new management style of the person in charge of this contract).

Can you give me some guidance on where to focus/where to start in SCS to help me work through this? I’m thinking to go back to the How to Get Things Done or Time Management, but also wondering where to get some guidance on how to figure out what I want and how to express boundaries with more clarity. Thank you so much!!