TMI! I experienced something new when I had sex after period.

Hey guys sorry if this is a bit much. I know I hate looking at stuff like this but I really don’t have anyone else to ask. WHAT IS THIS? My SO and I just had sex for the first time in a week this morning because I ended my period on Friday (lightly spotting, so technically Thursday) since then I haven’t spotted, my cm hasn’t been a tinted red color it’s been purely white! I’m so confused! And a little worried. My SO and I have been TTC for about 5 years now and this month I’m on my 4th round of Clomid so someone please help!