If you are female, don't concentrate on the 3rd eye. It'll be better if you concentrate on the breasts. Don't concentrate on only one but on both simultaneously. If you concentrate only on one, you will be disturbed. Just go on watching& don't get attached to any rhythm. A moment will come when you will feel bliss.
All meditation techniques have been developed more or less for men, so they give centres that are easier for man to follow. For female, the breasts is the positive centre. If they do that they'll feel happy, blissful & a sweetness will pervade all over & they'll feel light.
