I thought it was supposed to get easier

So the three year old is potty trained now.  The first couple of months it went great.  There was no peeing in the bed, no accidents.  Now all of a sudden, it's happening.  My prognosis, it's part of her needing attention.  Ryan, who walking and climbing and getting into everything, has to have my eyes on him all of the time.  And of course Savannah needs my attention...so how and where do you divide the time?  I try to give them all their special time, but it's difficult.  Aleesia especially wants my time when I doing something with one of the other children.  I'm praying about it and I hope that it gets better soon.