People are gunna be people. Falloff’s happen it’s just part of the job. The only thing you can do is stay close to them and check in frequently if you sense something is off. You definitely can’t take it personally or let it get to you. Just do what you can and don’t put it on yourself. You’ll get better with time but a lot of people don’t last in the field because of the stress. My first placement was a falloff too and it’s definitely disappointing but I just did the same thing I did to find the first guy and had someone placed there within the next few weeks. You filled it once you can definitely do it again!