I am glad you are jotting down your thoughts. It does help to have pen and paper handy for when you have that need to write. Some of what you jotted down may arise at some point...but I would wait and see how things go w/the MIL. For now, let's see what transpires in the days ahead.
I hope your insomnia improves and you can begin to get a good night's sleep more than once in a while. Keep the focus on you and your child.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.