36... First pregnancy... Week 9 still no US... should i be worried???

Ruah • Finally preggers with my rainbow baby🚼 baby dust to all you ladies!!!
I see women on here having altrasounds at 6 week 8 weeks and sometimes sooner and I'm just wondering if I should be worried or not? This is my first pregnancy so I don't know what to expect but my regular doctor wanted to wait until I was 16 week I'm starting with a new doctor on September 2nd and I'm hoping to get something for a little bit of peace of mind... I'm trying so hard to not be fearful of having a miscarriage but that's all I read about on here so it worries me and I just want to hear a heartbeat or see something to make myself feel better! I am extremely sorry to all of you ladies who have gone through a miscarriage😕😞 I was told that I'm high risk because I'm 36 years old so shouldn't I be getting one soon or should have already had one maybe??? Am I over thinking and over reacting??? Help!!! TY in advance!!! Good luck and baby dust to all of you ladies🚼🎊