Being dragged backwards

So I miscarried in July and had a D&C in August, I thought I was more or less moving on. Waiting to ovulate again was already starting to take its toll on me but in the last 2 days I've found out that both my friend and my partners cousin are both due at the same time I would have been. It feels like my chest is being crushed everytime I think about it, I don't want to cry about it anymore. I want to move on, I know its affecting my parenting (I have a 15 month old son).

How do I move on while watching two pregnancies develop at the same pace mine should have? It feels like it's just getting harder and I'm being dragged backwards instead of moving forward.