PM treats me like a slave

There is this new PM who is making my life living hell. Sets up his own timeline without consulting me how much effort it will take me to execute. The requirements are fuzzy and changes while executing. I am having to delete a ton of my code because they can't keep the requirements frozen.

The problem is that, I am being pulled into meetings all day and I am having to code at night just to keep up with my tasks. My life has become work and I have no time for my self-care.

Haven't gone home in 6 months now. I don't know what to do now.

Save me. Please. I beg of you. What should I do?