Period is Late

Amy Jo • Island Girl 🌅 | Music 🎶👌🏻
So I got my last period on January 19th till 24th and that was my second one do I'm guessing my third one would be due anytime now cause my app said but nothing but I'm wondering is it because my 2nd one lasted 5 days? My 1st one lasted 3 days but I am aware because I'm just in the beginning of my life as a woman! Has this happened to anyone else?