Completley paranoid?

Z is 9 weeks. She had morning sickness and breast tenderness, was tired and only slept in intervals. but everything seems to have stopped. The nausea, the vomiting, the breast tenderness, Z is freaking out. She fears we won't hear a heartbeat. She's obsessed and googling EVERYTHING about why all the symptoms can go away. Most say that at end of trimester 1 (which she isn't' at yet) they tend to disappear, but we're not there yet. Everything points to a missed miscarriage. I didn't know that was a thing, but we think it's happened. Everyone is telling us to be positive and it's all in her head or she's overreacting and needs to calm down because baby doesn't need this stress. We know, but we need an answer. Next ultrasound is May 19.