My periods are usually regular on a 26 day cycle but is now 5 days late. I’ve had period cramps (although not as strong as usual - haven’t needed to take painkillers) for the last 10 or so days but no bleeding. I took a pregnancy test this morning which was negative but have worked out it would’ve been 12 days since the deed was done so maybe too early to tell? I didn’t think I was in my fertile window at the time as it was day 20 of my cycle but now I’ve missed my period I’m not so sure. Any ideas why I could have missed my period other than pregnancy?