How to cope?

I’m 9 and a half weeks pregnant and trying to remain as calm as I can and as stress free but this week, I lost my best friend, he killed himself and I’m struggling with it so much, he was my everything yknow? My rock, my best friend, my therapist, my protector, he was everything to me and everyone who knows I’m pregnant tells me not to stress out and to remain as calm as I can for the baby but how is that possible when your going through what I’m going through?? 😭😭