CL dip or Implantation dip?

Katie • My name is Kate and I just gave birth to our beautiful daughter February 17th 2016. She is our world and we couldn`t feel anymore blessed❤ I am currently pregnant with our July 2018 baby!

So I dont know much about dips but is it possible to have an ID at 5dpo? I have a shorter 24-25 day cycle but, idk if that would matter or not. Ive also read it could be a corpus luteum<--sp? dip which is what Im leaning more towards. Just trying to educate myself a little more on this stuff.