App help, period calendar!!!

A
So im a full week late for my period but not getting to excited as its happened to me before and then hello period 😢
Anyway the app has the option to click period is late and moves it on a few days but does it record when you're period was ment to be due?? I tried it and it recalculated things but couldn't see it marking the day i was ment to come on, does it not let you record this?? Any help would be lovely xx