I'm glad you had a nice chat with MIL. It helped to set things straight and what you learned was extremely helpful to you. I'm sure your FIL sees a lot of himself in his son and he doesn't want him to travel down the same path that he did for very long and lose everything he has.
I hope that this week will be a better week for you. Please keep the focus on you. You are the prize!
Take care.
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.