A cycle lasts 28 days so count 28 days from the first day of your last period
You might be pregnant or just have a long discharge
For the rest of your life, sorry.
Until it's finished
When you're 17 and on your period, how long you have to wait until your period is finished depends on your body's menstrual cycle. The average menstrual cycle lasts between 5 and 7 days however, they can be shorter or longer than that.
From the time it began until it was finished.
If you are just starting it may take as long as a year.
Wait a couple of days after you've finished menstruating - you'll be okay.
it wont until you get ur period
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usually 6 months or so
usually every 27 days
Your period may stay irregular until you are 18 to 20 years old when you will develop a regular cycle.