What are your triggers at work and how do you manage them?

Sometimes I just freak out at work  (office job) and I find it difficult to identify what led me to it. Aside from having to much to do, I know that people who always reschedule 4 times a meeting trigger me a lot so now I when I notice this pattern I ask them in a very validating way not to do so ;).

Im back from a 2-month mental sick leave and I am so quickly overwhelmed, sometimes I feel like I’ll never be able to work ever again :(