Hi Annie.
I am so sorry you find yourself in the situation of being alone with 3 children. My first husband was a nightmare,having numerous affairs etc. It was a relief in some respects when he left but I remember the fear of being on my own with three small children (2 4 and 6)with no money, loads of debt he had run up, no job etc. It was horrid to put it mildly and I didn't have PD at that time.
I have now been married for 22 years nearly to a lovely caring man, who loves me despite my PD (DX in 2011). We look after each other. All my children are grown up now and I have a great job that I love.
I still remember that awful feeling though.
I am thinking of you, Things can get better in time, life has a way of sorting itself out.