Tmi question (no pics!)

This is my first time writing to all of you since being invited to this group... So let me first say HI!!!! :)

Quick summary of my TTC adventures:

My husband and I got married in September... I got my IUD removed September 4th, but didn't have a period by the end of November so I was put on progesterone. A week later I got a cycle but no ovulation. By March, I was about to see an OBGYN but finally got an LH surge. It lasted a long time (6 positive strips!).

April, I got only one positive opt but it was within my predicted fertile window. Wohoo! Success two cycles in a row!

Now for the TMI part. I've had light spotting for the entire week after my fertile week. I really thought my period had come early, except it never got heavy enough that even had to wear a pad... Basically only noticed blood when I wiped.

In short, I'm just wondering what that means and if anyone else has had either light spotting or a super light af. I figure it's too long to be implantation bleeding, but I'm just not sure if I should tell glow that my af started early or list it as spotting. What's going on down there??