Lost my son

Hey I been trying to learn how to cope with my son passing I been trying to get pregnant for 5 years and it finally happened I was suppose to have him Jan 2 2019 but end up having him October 2 2018. He was the cutest thing I have seen while stuck in nicu he passed October 15 I just know when I see my family and friends pregnant I’m mad or get upset because I was suppose to still be pregnant I have notice I have gotten mean and very forgetful lately and it seems that people tend to say the wrong things to make me feel better. Anyone has any advice on how to cope