2 periods in one month...

J💅🏾
Is anyone else experiencing this? My periods are beginning at the end of the month and ending at the beginning of the next month :/ This started in December & according to the app's predictions, I'm going to experience this until around June. (ex. 12/31-1/3 & then 1/29-2/1) Also, It popped on Friday 2/26 but I wasn't expecting it until Sunday.