Is it normal to go into an existentialist crisis after a miscarriage?

To wonder about who you are and what really is life and whether you mean a lot to God or simply nothing?

To have your heart beat so fast that you start wondering how far is your finish line anyway?

To physically be so exhausted that you wonder how bad could a paralysis be?

To be ashamed of how easy it is for you to doubt everything you ever believed in?