When do you eat/do anything during the day?

How do you do anything during the day? I am home alone while my husband is at work. My baby is a wonderful night sleeper but during the day he doesn’t nap unless he is on me and wants to be held and rocked the rest of the time. In order to go to the bathroom I have to put him down and he screams and freaks out. I feel horrible because he sounds like he is being tortured but I have to put him down. I can sometimes put him in a swing for a break but it’s very short. What do you do when you need to do something like eat? How do you not feel horrible when he screams? Any ideas to help so I can actually have lunch so I stay healthy? Thank you.