a question about drowning victims?

I drowned in a swimming pool when I was 18 years old....all symptoms of drowning were present as my mom and brother told me.....I was in a coma and they told me that I had blue lips and I was vomiting and coughing....I woke up and I found myself in hospital with tubes in me and oxygen mask....I think I stayed in a coma for like 2 days maybe in hospital, anyway....I survived the drowning obviously but....I didn't get any permanent brain damage or anything.....so my question is.....how common is it for drowning victims who survived to get a permanent brain damage? and is it normal that I didn't get any kind of brain damage??