3 weeks postponed?

i am about 3 weeks postponed on my period and i dont know whats wrong?! i am not have sex so i am not pregnant do you know what could be wrong? i have gain some weight latley could that be a factor?
Answers:

What could this inkling be?.. your best guess?

Not to be alarmed, sometimes women's periods adjust when something change. If you start a new errand, or you're hanging out near different girls than you usually do, the hormones from other women can set your period stale on a different schedule. I used to work at a jewelry store beside all females, and every time one soul started it set everybody else's off, too. Or it could merely be a change within your diet or stress level. Just don't verbs, it will come! (unless you're pregnant)

Accutane? yes or no?

i honestly don't know, but definetly go see a doctor, it can't be a great sign...sorry...

Help me for my sisters' sake?

are u below any type of stress?

What is yeast infection?

it could have to next to weight gain but enjoy u been stressed out seriously lately or anything because it can change ur cycle.ive skipped so i could be something close to that

I want to lose weight !?

how long enjoy you been have your period? it's not exceptional to skip one or two here and then when you're young-looking...

Can u be pregnant and the test be distrustful and get your what seem to be period ?

you could be stressed but i wouldn't verbs because i am 12 and i only have my period once surrounded by January and it didn't come back since i go to the doctor and they said that my ovaries aren't developed yet. If you basically started having your time of year maybe its like peas in a pod for you.

Is it bad for a 16 yr elderly to not have started her time?

if ure not having sex consequently.. i wouldnt worry in the order of it.. orrrr you should go see a doctor.

im shure its nought serious.