My daughter collapsed from vasovagal syncope.

Monday 1:30. I was reading a book at home when I got a call from my daughter. She should have been at class, but she called me crying. She said she had a dream where she passed out and hit her head while washing up, and when she woke up, she was lying on the bed naked. There was a trace of vomit on the floor, and the toilet lid was all broken, so she thought it was a dream, but she passed out in the bathroom. She said she couldn't remember anything that happened. My daughter goes to school in Cheonan, and I live in Changwon. It would take more than 3 hours no matter how fast I go... I left right away. My husband called 119. My daughter was in the emergency room, and although the CT and MRI results were normal, my heart and blood test results suggested an arrhythmia, so she said she should be admitted and examined in detail. She's 21 now... My heart pounded again. When I was admitted and looked closely, she said there was a wound on her head where she had hit it, and it was sore as if she had a bruise. The wounded area hurts, so my head keeps hurting and my stomach keeps churning. The next day after I was admitted, I got an echocardiogram and several blood tests since dawn, and my heart was found to be normal, so I was discharged. I was happy to hear that there was nothing wrong and that I should be discharged, but the other symptoms didn't seem serious. When I got home, my head hurt and my stomach kept churning, which seemed to be symptoms of a concussion, but I regret not asking and just leaving. As the guardian, I should have taken better care of her, but I think I took her symptoms too lightly because she was only pierced by her heart. I'm making sure she eats well and gets enough rest, but her stamina is really low. I'm also worried that she might collapse if she's alone. Since fainting is when you collapse without realizing it, it's worse to get hurt by bumping into something. I'm even more worried because I've fainted with the same disease. My husband was next to me, so I didn't get hurt, but when I fainted and got hit like my daughter, I got short-term memory loss, a headache, and nausea. I think this is a bigger problem.