Emotions help!!

So I'm 16 and I've just been really moody lately and I have a boyfriend and I'm just getting really jelous over stupid stuff an it seems like I've been snapping at everyone I don't know what to do my mood swings are crazy it's like I'm happy one second and the next second I'm really angry I'm not about to be on my period and I've never had sex so I'm not pregnant is it weird that I'm having mood swings like this?