It is easy to blame our mental health issues for everything.
It is especially easy when everyone, especially your doctors do. I know this. Finding a doctor who is willing to try new therapies, not simply mind numbing drugs is important, but not always simple. I hope this new guy helps you, but more, that he actually listens.
Writing a blog is writing, writing a journal for your child and/or yourself is writing. Writing him a lovely children's story is writing. Write a fairy tale, that's fun.
Whatever you do...keep your hand in and write something everyday. Try it, you may feel better as you have said. I see you at the desk writing your 'nap time' journal!