When too much lands at once, the mind stops sorting it and just feels the weight of all of it together. That's a normal response to load, not a weakness. It eases when things get smaller and more concrete.
What can help
Get it out of your head and onto paper. A list is lighter than a swirl.
Pick the one next thing. Not the whole mountain, the next single step.
Name what's actually yours to carry today, and what isn't.
Move your body for five minutes. It discharges some of the stress chemistry.
Ask for help with one thing. You don't have to hold all of it alone.