Period is 2 days late but Glow App has no option to indicate this

Please help me. How do I record my period being two days late? When I adjust the dates for my period start date to later date- the previous dates of ovulation rearrange based upon this change - which makes the historical data of tracking my cycle inaccurate. 
This is frustrating. I noticed women were asking this same question in 2015. Had I known I would have chosen another app. 
Does anyone have a recommendation of a more comprehensive app that can integrate fluctuating days for a period cycle.