@Gargron I was (am) in a similar place. Too much to do and little time to do it, the others were not caring about me, all they care about is what they need, only you can pace yourself. It's not a flaw to go slower.
For 2024 I took the resolution to be more aware of my wellbeing and pace myself. Let others realise that we can only do enough, that we would like to do faster but it's impossible. Others need to understand the urgency they feel will not affect us and all comes in due time.