Sister panicking about Covid.

Any doctors here? Anyone can provide any information for me to share with her? We both have Covid and she has been freaking out since it started. Everyday she googles a new thing that could possibly go wrong. She went to urgent care and they did a CT scan on her, because Covid cause a false positive on a blood clot test. However, the CT scan showed her lungs a bit inflamed, but the dr said that most people with Covid have that. So anyway, she comes home and sleeps then wakes up to her results of the CT scan, and it says something I can’t remember and mentions COVID Pneumonia. She’s thinking she has pneumonia and she’s not going to be okay and she’s going to be put on a ventilator and I’m honestly starting to freak out because it’s not helping either one of us. But I thought to myself, if she had something going on, the doctors wouldn’t send her home… right???

I’ve read so much online to calm both of us down and I keep seeing that 5-15% of Covid patients have severe cases due to age and health issues. We’re in our early twenties and healthy. Please guys, let me know anything you know! No scary stuff please, I’ve heard it all and we both need to relax!