I have had the Gear Fit2 Pro for 4+ months and it has just started acting up. Started giving me a message when trying to check heart rate but in the moment I just said oh well. It did it automatically but wouldn't when I wanted it to. Then I jumped in the pool yesterday and got right out. It started doing weird things last night- screen ant races, said it couldn't charge because the battery needed to warm up, and now it just shuts of after turning on. I left it off and it did charge overnight. But now it still won't stay on. I did a factory reset with same results. Did not put in "water mode" when I got in the pool as I was not going to swim. Just cooling off. Any suggestions?