I did a test this morning (early, but couldn't wait) and BFN, unsurprisingly. I actually think I may have ovulated later than I previously thought so I'm not giving up totally but I'm not really hopeful.
(I woke up at 6am and did the test, then spent 2 hours analysing when I got pregnant in December and came to the conclusion I must have ovulated around Christmas Day which was CD23. I probably should have examined this data before trying again in order to actually BD on the right date but I didn't so this month is probably no good. Ah well, lesson learned)