Hello Thank you for your query. If the pregnancy test is negative, chances are you are not pregnant , or in your case, you took the test slightly early. Other causes also could result in this abnormal spotting. Anxiety, stress, hectic travelling, rapid and recent fluctuations in weight, job stress, ingestion of hormonal medication, recent illness, fever or surgery - all could cause abnormal bleeding. Thyroid hormone or adrenal hormone dysfunction, raised prolactin level, polycystic ovaries, endometrial disease - all these also could be reasons. You need to visit a gynecologist to confirm the exact reason for the occurrence. Please have protected sex in the future. Take care.