I came down with gastroenteritis early Thursday morning. Sickest I've EVER been.

I came down with gastroenteritis early Thursday morning. Sickest I've EVER been. I'm 65. female. i threw up and had diarrea for 8 hrs. Thought it was gonna die. Husband took me to hospital for 2 liters of fluid. From what I read, it's really not that dangerous, but because of my age, I worry about it. I am better today(Saturday) but still am a little weak and yukky. Any of you guys had this stuff at my age? When did you get over it?