Is it normal to have a two do period on birth control ?

Question unclear but: Don't know what a "two do" period is, but many women occasionally have some spotting between periods, a heavier or lighter period, a different shade of color in the menstrual blood, a longer or shorter period, or even a missed period. Having one of these symptoms doesn’t necessarily mean there is a medical problem, but a visit to one’s doctor is a good idea if symptoms are persistent or worrisome.