I have anxiety about making it through the day today: volunteering at museum, AA meeting, my husband's laundry. Why do I have to worry so much about whether I can get things done, when I ALWAYS manage to get done what I set out to do?

It just makes my life so unpleasant to have so much anxiety/worry about just everyday life. I never used to be this way. Could it be related to my depression somehow? How will I ever make it working full time if I have so much anxiety about getting simple things done?