Massive hugs mrsharvey
I think some of the things your husband has said are so hurtful that it will be difficult to ever forgive and move on from.
Please open up to your counsellor about your thoughts about your DS. PND is common, and the way you are feeling is understandable considering your sleep deprivation and the way your husband treats you.
I honestly think - given time to heal from a separation - you will be better off raising your little guy alone. Give yourself a second chance to be truly happy