@Ninies - I used to get my period on CD 28/29, which makes my cycle roughly 27 or 28 days long. With Fertomid 100mg last month, my cycle was exactly 28 days long - I got my period on CD29/CD1. It was one day late... So not really a big difference. I also had very scanty period - Called Gynae about it on CD 2 and he said that it's a side effect of Fertomid. I should wait till CD 5, Test in the morning for possible BFP, if not, I can start on CD 5 with second round of Fertomid. I had brown discharge and spotting

. One plus is it made my actual period longer. For the last ten months before my last period, my period was roughly a day, or day and half. With Fertomid, period was roughly four days, with light spotting there after.
So it really depends on person to person. These forums and blogs are all good and well, and it's nice to read about others also in our position, yet each one of us are individuals and our bodies react differently to the TTC Journey and the fertility drugs. I would suggest give it until CD 5, Take another HPT, if still negative, then start with Fertomid. That's what my Gynae suggested to me.
GL hun! Thinking of you!