Ultrasound worries

So I had my 20 week ultrasound yesterday and met with my dr about the results from the ultrasound and my genetic testing blood work today, I was told that the blood work came back inconclusive because they couldn’t get enough cells from the baby to determine anything and that it means theres something potentially wrong with my placenta. There was also a calcium spot in the left side of her heart..Iv been classified as a high risk pregnancy and have to meet with a high risk ob as well as my normal ob now. As well as get ultrasounds every 2-4 weeks until baby comes. I’m freaking out because obviously no one wants to got to the dr and find out all the things potentially going wrong in their pregnancy or find out there’s something abnormal in their babies heart

Any moms or pregnant ladies experience any of these things???? I need some more info and google just scares me. Iv already had a pretty difficult pregnancy due to my HG, so this is just they cherry on top of an already scary pregnancy