It was the middle of the night when Karen Murray's daughter called out for her. Karen jumped out of bed. The next thing she remembers is her legs giving way from under her. She fell, hitting her head on the bedside table on her way down. “I blacked out,” the 45-year-old mum of two says. “A few seconds later, I came to and got up, but I felt wobbly and nauseous.” Her husband went to check on their daughter and Karen spent the next 20 minutes feeling as if she was going to throw up. When the nausea passed, she drifted back to sleep.
But the next morning, Karen woke with
