So I went to the doctor and everything today and he told me I'm measuring small but didn't say how…

So I went to the doctor and everything today and he told me I'm measuring small but didn't say how small. Her HR was good @ 160. I'm a little worried but I still have some time to catch up hopefully. They ordered a ultrasound to see her fetal growth. Just hoping that everything is okay.. Kinda worried now.. But I refuse to stress myself out about it because if I stress babygirl stresses and I can't have that. 👶🏼👑💕🙁