I might just lose my shit.

I work in home health. The spouse of my patient is a retired nurse and INTENSE. She constantly criticizes the care I provide. Complains to me and then complains to the Provider who sheepishly comes to me to let me know about the complaint but reassures me he doesn’t think I did anything wrong . This week I wrapped the gauze on the patient’s foot too loosely. Last week, I wrapped it too tight. The first time I met her, she went on and on about a schedule change I had nothing to do with. She hovers and criticizes and overcompensates for her own feelings of insufficiency or overwhelm. I have been in the nursing field more than a decade and I am tired. I have been patient, kind, and respectful but feel like I might lose my shit. I am in their home for 45 minutes twice a week. How would you handle this?