What causes a one day period?

So my Premom app says I’m one day late on my period but Flo app says in 9 days I’ll start my period but I’ve been having heart burn and my boobs are so freaking tender to the touch what do y’all think

Period is one day late can someone tell me Is this implantation blood or is it my period

I’m one day late on my period should I give it a try ? Please help, what should I do ?🤞🏼🙏

People miss one day of their period and be like “ I feel my baby kicking” 😂😂 people was me 😂🤦🏽‍♀️

dang i just had a sudden rememberance that one day imma have to have a period again 😕😂

Period is one day late but no spotting 🤷🏽‍♀️ could this mean i could be pregnant?

One day late of my period. Trying to hold off on testing to see if I miss my whole period or not.

Supposed to start my period in one day, Praying for pregnancy🙏Please pray for me y'all!

So I came on my period Sunday. I had two regular period days, one day of spotting, and now nothing. Is my period becoming irregular?

What does it mean when you only get your period for one day and then it goes off and you ain’t have your period in months?