Update: I was told an addendum is not necessary in my case, but obviously your situation is different and it's up to you. Th best advice from her was that no matter you do, say things in a neutral and non-defensive way.
I'm in a similar situation. I graduated from an advanced degree program in May and haven't been able to find work since then, despite my best efforts. I am really hoping to have a job by October, but honestly don't know what's realistic to hope for …