Saying no to a placement

So...as I mentioned earlier this week, we sent our first placement out to another home (not by our choice of course) on Tuesday. It was quite emotional and has been a rough few days. However, healing has definitely begun....or at least I thought it had. Today, we were called with another placement. Something didn't feel right...scenraio? Age? Something...so we said we were not ready yet. Why do I feel guilty? Our agency sure DIDN'T make me feel that way....they were great about it. But...something just feels amiss.:confused: Normal?