I'm the same way I sadly had a stillbirth this past April answer it's the worst horrific feeling to go through! Right now I am 27 weeks pregnant with my daughter and I just feel worried I feel like I'm traumatized answer even though I feel baby move I just can't help it!: /
Thank you, I work with ultrasounds but I don't like to use it all the time.
You could get a heart rate monitor for at home. The really nice ones are hundreds of dollars, but I'm sure there are more affordable ones or you could check eBay or craigslist. Ive never used one at home but I've heard it really helps to ease mom-to-be's minds especially if you've had a miscarriage. That way whenever you feel nervous you can listen to his/her heart beat and check the heart rate. Good luck and I'm sure everything will be fine.
Just have faith. All moms worry about things like that, but you just gotta have positive healthy thoughts :) how far are you?