First of all, I'm sorry for your losses and congratulations on your pregnancy. I understand now that you were meaning to be supportive, but at the time your post did not feel supportive. It felt like a sharp "get over it," which I don't find to be a helpful response to intense emotion. It wasn't really bitterness I was expressing as much as sadness, for my parents and for me. I was tossing my experience out there in case there were others who could relate in some way. Anyway, having said that, I agree with you that we can choose how to react to our experiences and that we can adjust our attitude. I am getting better at that.
My very best wishes on your pregnancy. I look forward to hearing your good news.