My cycles are 24 days.  They are always on time. Once in a while they will be 1 or 2 days late but then full 4 day period. This time I was 2 days late and then had a light "period" for a day and a half. Then nothing, except cramps and nausea! I took a test last night and it said negative.  Anyone have a similar situation?? I've never really been nauseous after a period.  I'm worried it might be something bad... Any advise would be greatly appreciated.