Just paranoid??

I am 9w2d.
At 7 weeks I had an ultrasound, everything looked great, HR was 134bpm.
This is my first baby, I've been trying for 5 years.
My animals all seemed very aware of my pregnancy. My chocolate lab puppy who is very hyper stopped jumping on me and would instead put her head right on my stomach. She has stopped doing that.
I've also noticed that my nipples haven't gotten darker and the swelling in my breasts have gone down....
Should I be worried?
I'm so scared my baby doesn't have a heartbeat anymore.
I have an appointment on Tuesday.