Your symptoms suggest hormonal
imbalance. If you are sure you weer not pregnant before the onset of this bleeding episode, you are in a hormonal disturbance. You definitely need a specialist's help here and at least some hormonal supplementation along with styptics to arrest the bleeding and nutritional supplements to counter the anemia
that may have developed. So, please do see a doctor instead of wasting money on tampons and ruining your health. This, kindly note, is important. Wish you good health.