Miscarriage unsupportive partner

I had a miscarriage a couple of months ago. I have a 2 year old son, I felt really unsupported by my partner after it happened. The day of I told him to leave me alone & that I don’t want to talk about it. I kind of pushed him away. The next day I cried to him & told him I was in pain and obviously sad. He didn’t listen and instead told me he’s feeling sick and tired and he wants to sleep, leaving me to tend to our son.

I never really got fo process it, I felt alone so I pretended like it didn’t happen. Flash forward to now I’m feeling really emotional about it, like I’m only just realising what’s happened. I saw another pregnancy announcement tonight & I started crying. He asked what was wrong so I told him. He replied with whilst sitting on his phone “at least you know you can have babies, imagine the women who can’t and how they’d feel” I understand there are women out there who can’t have babies, I feel sad for them. But I feel like he’s completely invalidated my feelings. I told him how that comment made me feel & he said I’m overreacting and he just wants me to have “gratitude”

Am I overreacting and just overly emotional or do I have reason to feel alone & unsupported?