Endometrin After IUI

Ashlyn
Hey ladies! I'm 9dpiui today and I've been using Endometrin (vaginal progesterone suppositories) since 4dpiui. Did anyone else use Endometrin? 
I'm asking because every sign of pregnancy could also just be a side effect of the progesterone in the Endometrin. It's so hard to tell the difference! What sorts of symptoms did you have before you got a BFP