Pre natal depression

I went for a mental health assessment the other day and the nurse said there was no point in putting me on medication as I only have 7 weeks left and it takes 7 weeks for it to work which I understand but I'm worried I'm gonna get post natal depression too. I suffer from anxiaty too and I'm just so anxious about labour as my last didn't go too well. I don't know the point to this post but maybe other are feeling the same and we can support each Other?