12w4d

and everything has been good my entire pregnancy so far
But I can't help but wonder that my baby is still healthy. I haven't heard its heartbeat since 10weeks at my doctors appointment.
I've been fine. Im eating good, getting rest, I have no bleeding or severe pains.
Should I just stop stressing ecspecially since everything's been find lately? I really need some reassurance/: I just wish I could have an ultrasound every week.
I'm a first time mom and new to all of this