Hey sweety
firstly . Glad to hear the DR wasn't worried. My little bubba has/had cysts as well and they couldn't see all of her heart they told me she was laying wrong but like you they managed to get all four chambers . I had my second u/s and they said everything is fine.
With my first DD they said she had short limbs possibly genetic and to monitor growth she turned out to be 48.5cm long when born so I find some u/s really unrelieble I hope everything settles for you, you've had a tough run
lots of hugs kel