Some advice, please

I left a mentally abusive relationship 8 months ago. My ex had a bad methadone / heroin issues. I have full custody of our 4 children, one of the children being his ex’s daughter whom I adopted in 2015 and been raising since 2013. She is 6. Anyways, I had a few hook ups with someone I have met a few months after the separation. And just found out I’m pregnant. I am keeping it, I am just worried about society and I still worry about judgement from my ex (stupid, I know) what advice can you ladies give me to keep my stress under control? Am I able to fully block him except maybe emails to not deal with his verbal harassment since I have full custody and there’s no set visitation?