Weird spotting, help! *TMI*

Hi all

I have had a strange cycle with temps all over the place, not really sure when I O'd, but had well - timed DTD anyway. Am in 2nd cycle post lap, and will be starting IVF this cycle once AF arrives.

I have started spotting which is not unusual for me pre-AF, but it is REALLy dark in color, darker than brown and almost black. I do not have full flow, so can't even ring the IVF nurse to tell them I've started! I also feel a bit sick to the stomach and have felt like this for a couple of days. I have POAS twice - negative. I'm day 30 today - usually get AF day 27, but can be irregular.

I know I have to be patient and either get AF or re-test :p, but I was just wondering if anyone had this kind of spotting and went on to get their BFP????? Anyone?????