guilty and scared for being pregnant

I'm feeling so sad and heavy hearted- my older sister had a hemorrhagic miscarriage yesterday at 10 weeks and didn't know she was pregnant. She tried for many years and was unsuccessful and told
She would never bear children and now this.... so devastating. I'm 14 weeks pregnant with my first and feeling guilty and scared that this is going to happen to me and that I'm pregnant and she just had this loss. This is the most anxiety I've had all 14 weeks-