Am currently 17 days passed my expected AF arrival with no sign of it. Have been having nausea and dizzy spells although the nausea has subsided these last few days. Have done PG tests every 3 days or so but all negative. Am worried now that something else is wrong. Have got a GP appt Wed but wondering if anyone else has had an experience like this? My cycle is usually a reg 28 days. Never missed one before.