Hello, I have gone through your query and understood your concern. If you have never had a disturbance of the menstrual cycle earlier and if you are sexually active, please confirm/exclude pregnancy first. This should be done in the current scenario through an estimation of the serum beta-hCG titres as the urine test may not read well at this stage. A trans-vaginal sonogram also helps to know the status of the pelvic organs and thereby helps to know if you are pregnant. If positive, you can attribute your symptoms to this and the spotting could be an early implantation bleed. If negative, this spotting is likely to be due to hormone deficiency and can be corrected with supplements. This may be a transient defect only. Hope your query has been answered. Take care.