Someone please shed some insight on me

Jestice

I had a doctors appointment today. BP measured fine & urine was clear of any protein. However I’m 25.5 weeks but my fundal height of uterus was measuring 28cm? My doctor has scheduled a ultrasound at 28 weeks to check his growth. Anyone have any insight on this? Have you ever experienced this? & why the heck is my anxiety at an all time high?