ok genuine question (help me out girlies)

so i have been having my period late recently like it usually comes around the 15 but lately its coming later and later. so like im hella confused and my parents are hella conservative (ya know asian parents) so they won't tell me anything about my period and im to lazy to do research so like is this normal?? Also i literally get cramps at least once in a month, is that also normal?