When do you know you’re done it right?

I feel so overwhelmed by both my kids needs. I can’t spend more than 10 minutes on something before someone is crying. I can rarely get them to nap at the same time. When I set my baby down my toddler wants to sit in my lap or be held or to just use my body as a race track. Now she’s begging to nurse again after being weaned for a full year (she weaned last January at 19 months, she’ll be 3 in June). My baby’s also turning into a fuss butt and won’t be set down for more than a few minutes without me being next to him so I end up wearing him half the day trying to get something done but nothing ends up finished. He just started crawling forward but is still getting frustrated with his and I feel a tooth cutting.

It’s just too much. My sister is having her first baby soon and I’m flying to her soon to help out for a few weeks.