He's just so different ?

My SO has been really short tempered the past week. Gets very mad if I start getting fustrated about something that isn't even related to him. He keeps claiming I'm giving him an attitude but I just feel like its cause he's so spiteful lately. It's like he's getting all my damn hormone moodiness ! Anybody else in this boat ? I just want my loving boy back who understood what i am going through.