When will a chart dip if period is coming?

Question

If there is a dip does that mean period will probably happen that day, or in a few days? 💗
My chart is crawling up at 12DPO and just holding on to tiny slivers of hope 🥺

Answer

Maybe, maybe not there’s a lot of normal variation from person to person; month to month
Good luck ✨🤞🏻