Okay, here I go....

......it's normal for some woman to have annov cycles once in a while. So don't get discouraged. Secondly....
GET THAT ULTRASOUND WOMAN!!!!! If something is going on, and you do get pg, u might not be able to carry to term and can be dangerous to fetus or u might m/c. So u really need to see what's going on. You had a long AF this time, you may have a longer cycle so u may O later than usual. Also maybe this spotting is from O...although I'm not sure your temps show you've O'd yet.
Anywho, just my thoughts......but i do really wish you would get that U/S done. It'll also show if u have any follies growing. It would be very beneficial. Good Luck!!!!