Words for a real moment
What to say when someone feels overwhelmed
Do not add another open-ended question. Offer one small option that is easy to accept, decline or ignore.

Words you can use
A ready-to-send version
This sounds like far too much to carry at once. Would a short call, a voice note, or simply a quiet message suit you? Say yes, no, or nothing at all — I will follow your lead. You can decide later today.
A useful approach
Acknowledge that they have too much on their plate without asking for a full explanation.
Offer a short message, a ten-minute call, or quiet voice-note company.
Leave the offer open for today; do not send another message until tomorrow.
Make it fit your person
Change the relationship, timing and tone
No name is needed. Optional details are not stored.