For the last week my watch has been on swimming exercise. It randomly tells me I'm swimming. I've shut off auto detection of exercise but then I don't remember to turn it back on. It's been less than a year so it should be under warranty, but when I look into that I have to send the watch back for repair and then wait however long for it to be fixed. I can't be without my watch, I need it for work. How does this work?