40 kazillion sperm cannot get me pregnant...

So we did this 30 in 30 challenge (being intimate 30x in 30days) and got more than 1/2 in BEFORE O.
I got my OPKs in 3 days before my spike, got pretty lines, and I ovulated beautifully, right on time.
Perfect charting spike said I O'd and my temp stayed up...
4 days ago I started spotting.  On/Off. Test. On/Off. Test.
Today at about 1 am I started AF in full.

I guess 40 kazillion sperm cannot get me pregnant...

So, DH wants to order Zumba for me since i'm loving it (see previous post). If I can't get pregnant I'll just get skinny! Still TTC for sure... just focusing on me for a change.