Irregular....shorter cycles?!

Katherine
So usually every 28 days I'd get my period since I was a teen. I used <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> before installing glow and just put all the info in. My cycles seem to be shorter and inconsistent now as you can see in the pictures and AF usually lasts for 6-7 days. The months that I would get two periods the second one of the month would be light, but enough to wear a tampon so idk what that's about.. :-/ anyone else in the same situation with me? Thanks :)