miscarriage fear

I am currently week 14 and 5 days pregnant I am also plus size and can’t see any growth bc of that which is fine but I have awful anxiety about losing the baby. We finally told all our family and jobs and my last ultrasound was week12 and then my next one is not till week 20. Now maybe that normal but my anxiety is making me unable to sleep. I want to request another at 15 or 16 week just to calm myself but has anyone done that?? I want to enjoy this time but my fear is just over taking all my emotions. What can I do??