Is this normal???

Courtney • I`m 16, a cheerleader, & am in a relationship
Is it normal To like not get hungry at all when I'm on my period? Like I get hungry... But I don't feel hungry so I don't eat.. but I still get as if I was hungry like if I don't eat I still get a headache and feel sick and stuff but I don't ever have a appetite or want to eat bc I feel full... Is that normal?