Delayed period

So I’ve been delayed for weeks now, like I wondered February is ending and my period ain’t coming. Well thank the heavens it arrived just, really late. Anyways, it is scary to have an irregular period. Though I don’t do any sexual activities since I am saving myself for marriage. I still find it hard because I can’t really dictate my period to come at this point or leave at that point. It really exhausting to always be on gaurd not knowing if you are having a period or not.