Faint positive one week after period?! Help!

Rachel👼🏻👼🏻👶🏻👶🏻 • Happily taken by my best friend♥️ 2 precious little girls, Aria Jaide and Sophia Reign💕 5 1/2 years and we finally got our rainbow x2!!🌈🌈God is so good♥️♥️♥️

So, here it goes! I just finished a 21 day period on the 3rd and some how had two positive ovulation tests two days after it ended. One on the evening of the 2nd day after and a no doubt positive on the morning of the 3rd day. I’ll post a pic of them in the comments. Today I woke up feeling sick so I decided to take a cheapie just for fun. I wasn’t expecting anything from it but here I am with this! I’m so confused! How could this be possible only 7 days after a 21 day bleed??? Taken within the time frame. It has color, my camera just isn’t too good. Im just baffled😕 Any advice or stories are helpful😊