I did an IUI on the 15th and can test on this Thursday. However, I started spotting a tiny bit last night and a little more this morning (CD20-21). My cycles usually run from 28-33 days, so it is really early for AF. Also, I am on progestrone supplements so I really thought I wouldn't start until done with the pack. Could this be implantation, or is it too late? I am going nuts! :eek:

It could be implantation.

Good luck I hope you get your BFP