When will I acquire my next length?

This may sound similar to a dumb question, but if I know the date of my ending period, and that my cycle is 28 days, am I supposed to bring back my period 28 days after the launch of my last term, or is it more like 21ish days? I know that when you're on the pill, it usually give you 3 weeks of active pills, and 7 days of placebos, so I be curious if your body works the same mode? I know that sounds dumb. Thanks in finance.
Answers:

Tampons question?

It's not a dumb grill at all! It can be confusing.

It's 28 days from the first day of your ultimate period. If you're not on birth control, it can be more or smaller quantity than that. I read somewhere that it can vary as much as 21-35 hours of daylight. If you're on birth control, it will be more regular. After you've been on it a few months, you'll sense that your periods start on matching day...at smallest mine do. Birth control does that because it controls the amount of hormones your body receives. Hope this help.

What causes abdominal cramp during mensturation?

I think it is supposed to be 28 days from the first day of your later period, but usually its not going to be a superlative 28 days, somewhere right around in in attendance though. Everyone is different, could be a few days before or a moment or two after. It is more regulated when you are taking the pill, I guess you know more likely when you will start.
You could other ask your doctor about this, it would tender you a better understanding.

Has anyone have Norplant before? what's it resembling?

most women get theirs 28 days apart, but, however, it can be 7 days more or smaller amount, but if you just started, it can be adjectives screwed up, so... don't worry