Hi
I get my period quite regularly around the 16th of each month, suddenly this month I don't get it and on the 28th start discharging (lightly) black... now its 3-4 days later and there is no discharge and no sign of a period?
Very confused, don't think I am pregnant as pregnancy test was negative...
Please note I am not on any contraceptive, never have been, and my first child was conceived through IVF, he is now 4 years old. Been feeling nauseas randomly, but not constantly...

Any suggestions?