Guilty, worried, concerned?!

I recently found out I am pregnant with baby 2. With my first, I was much farther along and had awful symptoms. This time, there’s no symptoms and I am worried. Everyone around me has miscarried. Three of my best friends recently did so now I feel like I’m next. I don’t know why I feel this way. My first pregnancy I felt extremely assured baby was healthy. This time I feel worse about the situation and I have no clue why. When will I know if baby is okay?? (I’m seriously between 2-4 weeks only.)