hi Minxi, I know I said I wasn't going to do chart-meddling anymore but....
I'm looking at it and wondering if you are having an anovulatory cycle. They can be much longer than normal cycles. Have you been under a lot of stress recently (TTC in itself is stressful)?
Also wondering about the temps, you have charted in farenheit, but in your post are giving temps in celsius? Which type of therometer do you use, and what kind? I ask because whichever way you look at it, this month your chart has jumped around an awful lot from about CD24.
I still think there's some possibility you did O on the 25th or 26th, as both are big one day increases. However, with temps at 36.14 I can't see how you can confirm it because there's really no upward temperature shift pattern with the temps you got the last few days.
If you did O on the CD25, that would make you due for AF on the CD38. I'm thinking a more likely scenario is that you're having an anovulatory cycle and the spotting is your body figuring it out. At least for me, whenever I have anovulatory cycles, I get spotting for a few days before AF. When I've ovulated, I usually don't spot, or only 12-24 hours before AF comes on full force.
Ramble ramble ramble
Rattling, I reckon you stayed in the same hovel I did when I left hubby in NYC. There was a guy who, every morning at 5am, would start screaming 'Get out of the f*ckin' bathroom!!!'