White spots on ultrasound

I started going to a ultrasound specialist around 20 weeks because my regular doctor seen a bright white spot on my baby’s heart that is known as “EIF -a calcium build up on the heart”. They also found a “white spot on the baby’s liver . Today I went back to make sure the spot on the liver wasn’t growing in size and the specialist seen a white spot on the intestines. The specialist had mentioned something about Cysitc Fibrosis but she wasn’t saying I had it. She’s 90% sure these spots are nothing to worry about but keeps saying Cystic Fibrosis is not ruled out and we won’t know more until the baby is born. Has anyone had a similar experience with this? Anything helps. Thanks mommas!!

I would also like to add... I had a genetic test done and tested negative for DS.