According to the Center for Young Women's Health (it's an American website - I know how to spell centre) normal vaginal discharge is cloudy white and has no or little odour.  If your discharge bothers you, you can wear panty liners (although some experts say these can make the problem worse) or wear cotton underwear which is absorbent and allows your girly bits to breathe.  
If your discharge changes dramatically, has a strong odour, if you are itchy or it hurts to pee, you could have a vaginal infection and you need to see the doctor.  It might be a little awkward but it's not going to go away on its own.  You can read more here.

Everyone's menstrual cycle is different.  They usually start between 9 and 14 years of age, they may last 21-45 days, most girls lose about 80ml of blood each cycle and many girls experience symptoms such as bloating, irritability, pimples and tiredness just before their cycle.
Some periods are not normal though and according to the www.womenshealth.gov you should see a doctor if:

• you haven't started your period by the age of 15
• your period suddenly stops for more than 90 days
• your cycle is shorter than 21 days or longer than 35 days
• you are bleeding for more than seven days
• you are bleeding so heavily that you need to use more than 1 pad or tampon every 1-2 hours
• you have severe pain during your period
• you feel sick and get a fever immediately after using tampons.

According to a recent study of girls/women aged between 10 and 60 by Dove, only 20% of Australian women surveyed felt body confident and many who were not blamed unrealistic standards set by the media. You can read more at www.bodyandsoul.com.au.
Some important factors:

• As a country, we are getting bigger.  27% of 5-17 year olds are overweight and 63% of adults.  Therefore, the number of women and girls unhappy with their body is likely to increase with our expanding waist lines.  
• France introduced new laws late last year enforcing models to obtain a medical certificate stating that they had a minimum body mass index (BMI).  The laws also require magazines to identify photos where the model's silhouette has been edited.

What you can do:

• Read the Butterfly Foundations fact sheet about body image.
• Move more, sit less - the Australian Department of Health recommends that teens between the age of 13-17 engage in 60 minutes of moderate to vigorous activity per day.
• Eat well.  Check out www.betterhealthvic.gov.au Eating Tips for Teenagers.