Split after Miscarriage

My ex and I split about a year ago over the inability to get past a miscarriage. This time of year has been tough for me, seeing little kids playing with Santa or their new toys, new mothers with their babies. When we split, we were screaming at each other daily, I couldn't sleep, I couldn't eat. The change in hormones was murder on me. Just terrible. And, before you respond, please know I have nothing but love and happiness for my ex. He is a great man and I called it off, everytime I looked at him I saw our son and it was too much.
We were 6 months pregnant and one day our son's heart just stopped beating.