What can be the cause to have a pink flow and punctures in the abdomen two weeks before period?

There are multiple causes that can explain, from normal, such as a small breakthrough bleeding secondary to estrogen deprivation (In anovulatory cycles, which can also cause discomfort of the type referred to) or using drugs (like contraceptives, which are one of the most common) causes or substances which may alter the cycle (like ginseng) or intercurrent disease, such as infections, fibroids, ectopic pregnancy, spontaneous abortions or threatened abortion ... Should first performed a pregnancy test if there is possibility of it, if there is no possibility, or not, if you take contraceptives should change the wording, and if not taken, would be advisable
gynecological examination.