For one week I have had a red gental bleeding and now turned to brown.my period will come in about one week. I take yasmin birth control pills and all my tests(pap, sexual diseases and discharge )were very well. My doctor made all of these 2 weeks ago.

I am a slim person: 52 kilos and 174 cm and I practice fitness and running 3times /week.

I eat about 1200 kcal and only organic fruits and no sweets or fast food.

What can this bleeding be?

Being a slim person can cause early menopause?