Hello dear,I understand your concern.In my opinion the spotting might be due to various reasons like hormonal abnormalities like thyroid abnormalities,progesterone insufficiency,any miscarriage,any excess physical strain,cervical bleeding etc.All the above causes should be ruled out by doing ultrasound,thyroid profile etc.Contact your doctor and discuss regarding these said things.Avoid physical strain and intercourse.Iam just trying to give you information and not diagnosing any condition ad it needs physical examination and necessary investigations.So relax. Best regards....Dr.Srilatha