psycosis is an possibility or depression dont leave this unchecked as the last thing you want to do is hurt someone you love i have had problems before and i know how uncontrolable anger can get when you loose it like that you are not in control as you say you can say things you would never normaly say you could also hurt someone you love so speak to someone doctor,family member but do not let this fester as it will only get worst it is good that you notice something is wrong that is a start hope you sort it out