Since her blood pressure is stabilized, there's really nothing to worry about. She'll be fine. Generally, when you're not able to have a sound sleep for many days or weeks, it takes its toll on your health. After having enough rest in the hospital, she'll be so much better. So, please calm down.
Have you thought about this? The only reason your brother was able to joke with you about it is because your mom is fine. That should rest your mind.
Thank you for that and yes, I was calm during the day. Just had to let my thoughts out through writing this in the morning.
!CTP