I was in the bath and my heart started to pump fast I thought it was because I was hot so I got up and put the shower on to cool me down and my eye sight started to blur so I switch the shower of and was getting out I was holding the sink because I started to get really dizzy and couldn't control it then my eye sight got worse and I couldn't make out a lot and then all I remember is hitting my back of the bath and lying on the floor so I'm guessing I fainted but what was the cause or is there something wrong