H.F.
I've got four babes also, (8,6,4,2) - this is normal behavior, and you should ride it out. My youngest did the same thing at about a year, and it was VERY difficult trying to have company for dinner, like you said. It didn't last forever. Maybe you've got a couple months to go?
And, yes, some days are joyful, and some stressful, like you said!