There is probably some hormonal
imbalance and can be remedy with relative ease. As you have indicated you have miss some pills which could explain spotting. However spotting could be a side effect of pills. As a breast-feeding mother only progesterone
pills are good for you. From you menses, you have as well irregular menses (polymenorhia - i e too frequent). So, pills will have 2 roles: contraception
and regulation of period. So my suggestion is that you take the next pill immediately and continue with the rest, making sure you do not miss; you will have to take this for at least 3 cycles to have good effect. Remember to take iron & vitamin tablet as supplement.
wish you good health