When i read this i thought to myself...she JUST got back!
So i feel the same that it seems too soon for you to go back to work,especially when your 3 lovebugs are so happy with you there everynight.

Please don't worry,and you know they'll be fine.
I wish you didn't have to go to work anymore...it's so hard when we think of our cats like their humans.We just get to close them don't we!

Try to keep in the back of your mind that they have become to know your scheduled routine.
And the best thing for cats are routine...only i know you'd all be happier home all the time.
but cats do ok when there is routine(positive not negitive of course).
So know that they'll be the same when you get back.Happy to see you