motionlessmachine, For all my fellow over sharers out there.
As a chronic people-pleaser, this is my advice for success.
Offer as little as possible. Be terse. Get rid of all those exclamation marks and tidbits about why you want to take a sick day. State your needs clearly and concisely without reason. Start saying “No, I’m unable.” more often. Say Thank You only when the other party deserves it.