I think that thread is missing!
Congrats on the 4 little ones! Just when you think the panic of labor begins...then comes those worriesome next few days and weeks.
Just keep your vet's number handy. I do know it can take a bit for the kittens to nurse, or for the mother's milk to begin pumping. Have the colostrum replacement formula handy, and KMR. 4 bottles and nips too. Are they in a cozy spot? Perhaps leave momma be for about a half hour, and go back, and see how everyone is doing. If kits begin to cry...they're hungry! Wait a bit further, and see if momma begins to nurse.
I'm so happy for you. Everything will work out great, you will see. Queens come with more instincts than they sometimes know what to do with, but it all kicks in in due time!