My teeth move slightly?

i can wiggle my teeth ;o its only slightly, but if i hold it and gently wiggle them, they actually do move backwards and forwards. is this normal? as i child, i never used to care for my teeth. i have a VERY good reason but im not saying it on here. anyway, i take care of my teeth now, since the past year, because im now able to. i dont always floss, but i do every two or three days. i brush twice a day and use mouthwash once a day. why are my teeth moving xd? im terrified!