Most women get their period every 28 days (about once a month) and it usually lasts 5 to 7 days
Not really. Often your period can be delayed a day or so by sex. If you haven't had a period in several weeks take a test.
yes
Most often, no. The supposed "normal" length of a menstrual cycle is 28 days but most women will have shorter or longer cycles.
from the age of 7 to 14
Two week
you are not supposed to have a period if you are pregnant.
It's possible. Stress can cause ovulation to be suppressed, but that would've been two weeks before you were supposed to get your period.
This is common.
Yes
There are doggie diapers that you can buy and have your dog wear.
how AM I SUPPOSED TO KNOW jeez
Yes your first period is supposed to be a very light one.