Have you read the patient information leaflet in the pack?
Vaginal bleeding may occur at irregular intervals while using
Desogestrel. This may be just slight staining which may not even
require a pad, or heavier bleeding, which looks rather like a scanty
period. You may need to use tampons or sanitary towels. You may
also not have any bleeding at all. Irregular bleeding is not a sign that
Desogestrel is not working. In general, you need not take any action;
just continue to take Desogestrel. If bleeding is heavy or prolonged,
you should consult your doctor.