Am I the only one who can't stop worrying and overthinking!?

Emma • 19 mo twin boys 💙💙 7mo baby boy🤰🏼 baby #4 is a GIRL 🎀 on the way!
I can't be the only one! I feel like the worry of this pregnancy is consuming my life! I'm constantly researching signs of miscarriage etc etc.
I had a miscarriage in February and now I'm absolutely terrified it will happen again! 
I'm literally spending my whole day researching! My first scan is next Wednesday and I'm so worried about not seeing a heartbeat! 
Please give me some advice!!!!!!