JJ, in all that, I forgot to give you my advice. I would stay the course you are on. What is the current contact w/ your ex? I realize that you have to be very careful as to not come across as pursuing, but I would think that there would need to be some mild contact so she can notice all your new changes.
Do you have a plan at this point? And have you read through the MLC boards here? I wonder if your ex was going through something. Hormones can go bonkers around 40 as well.
Me: 48 EW: 40 D8, D12 Married 13 wonderful years D in Apr-12