Help please! I am on CD26 of a cycle that is usually at least 29 days. DTD on cycle days 17 and 18 and think I ovulated on CD19. This morning I was very surprised to see a tiny amount of brown spotting when I wiped. It's now after 6pm (not in UK) and I haven't bled at all since. How likely do you think this is to be implantation bleeding vs the dreaded arrival of AF? We have been TTC for 18 months, had two miscarriages and a chemical, and I'm desperate for this to be my month. Thoughts please?