Say what you need to say, but do it respectfully.
Your partner may be feeling insecure and they might be right in it too. Your relationship should be on the top of your priorities.
Don’t spend the day going over and over again the same task. If it doesn’t seem quite right, go back to it after you do the other things.
Do something physically challenging today. Run a few miles; swim a few laps, etc. it doesn’t matter as long as you move your butt instead of lazing around.