Purdey, my love, from those latest temps I would not say you are doomed. The temps aren't anywhere near touching the cover line and so there is no indication that progesterone has plummeted (so no imminent AF). However, the last two temps are open circles. What happened?
Can't remember who questioned the validity of temps taken a couple of hours later than normal (on the weekend, for example). I found this explanation largely unhelpful but you may benefit: 'Basal Body Temperature variation with time is dependent on your own unique metabolism. While most women see a difference, some women do not see much difference of the BBT with time and can live with a variation in time without masking their pattern. For many others even a 10-20 minute difference will have strong effects on their charts. Similarly, some women see an increase of their BBT with time while others may actually see a decrease. From the diversity of the charts that we have seen, it is quite clear that no simple generic formulas will be able to compensate for time differences.
Our advice is to use an alarm clock if necessary to try to keep the time as constant as possible. If you have an occasional waking time difference, just record the time but leave the data as measured and make a note if there are unusual circumstances. In most cases Fertility Friend should be able to see your ovulation pattern even with a few inaccurate data points.'
Marmite, I'd love to see your opks; I've never understood how someone can get equally strong lines two days running as a true LH surge is supposed to last for a maximum of four hours 
Missmummy, if you're ov-ing today then definitely rock the caravan.
MaMa, I laughed at your prediction for Wednesday
What dpo are you today? Linguaphile is spot-on regarding implantation blood; it is brown due to the age of the womb lining that's been building up for ten days or more.
I'd just like to make clear that I am aware of coming across as a know-it-all or that I'm monopolising the thread with my posts containing stuff I deem helpful. I really don't want to put myself above anybody or pretend I'm the oracle of fertility. Forgive me if I have come across that way. I would hope someone would let me know if I'm getting on folks' nerves xx