Period last month lasted 7 days no signs of period yet due in 3 days should i be worried?

Need more info: You should be having a monthly period (unless you are on some birth control methods). If you have skipped a period and think that you could be pregnant, check a pregnancy test. If you are concerned about a change in your bleeding during your menses, talk to your doctor about your periods. It is helpful to keep a calendar of your periods to review with your doctor.

Unclear: I'm not sure i understand your question. Is a 7 day period longer than usual? If also sounds as if you haven't missed a period, so not sure why you're worried when you have 3 more days to wait until its expected. Wait 3 more days to see what happens.