The social workers there are trained for this hun, it isn't something they haven't seen before. The letter from your social worker will probably go quite a long way.
Is your appt with a C'link social worker? If not I would ring and discuss changing the appt. I'm sure it's already with one, but I wanted to let you know you don't have to spill your guts to the Joe behind the counter - it's fair you deal with someone with the qualifications.

GL xoxoxoxo