It is difficult identify vaginal spotting as caused by your period, or not. However, you seem to exhibit signs menorrhea, or infrequent menstruation, and long menstrual cycles. Menorrhea can be the result of a disorder of either the axis hypothalamus, the pituitary gland, or the ovaries. Diagnostically, your doctor or gynecologist can check your blood levels for FSH, LH, estrogen, progesterone and prolactin in order to determine the source of spotting. Further, an ultrasound examination of the uterus and ovaries can be requested to verify the health of your reproductive organs. You can visit your family doctor or a gynecologist in order to follow up and request the diagnostic exams