I'm not really the best person to be your first responder, as I am also a new FC and really struggling. But, as I went with LA, I was able to still work and was encouraged by my social worker not to give my job up. Phew, am I glad she did that!
We've only had one placement, and I'm afraid to say that I've asked LA to move them on ( see my last thread on here). Now I'm counting the days until they go 
I'm also feeling terribly guilty about letting the LAC down, letting the LA down, making matters worse, but also feeling guilty about how the experience has affected my 10yr DD.
It also leaves me wondering if I will ever be able to do this again? Is this how it'll alsways be ?
( although my SW and theirs have told me that this behaviour is extreme and I was very unlucky)
My work is suffering at the moment as I'm consumed with all things fostering, but luckily I work flexi hours and can easily catch up when things are calmer.
I feel so guilty about moving them on I didn't go back to my thread to let other posters know! 
What are you finding hard New2? I don't think I realised how long short term fostering would be to be honest, and how fustrating it would be when you can't diciple a foster child as you would your own. (I'm talking about punishing and sending to room, not hitting them)