Thanks for your query.
1. Since when are you on 6 depo implants? - Well depo implants have been used for contraceptive
purpose and it very well serves the purpose most of the times. Minor irregular / intermenstrual bleeds are associated with such depo preparations. Therefore, this would be my first explanation for the spotting.
2. It could be due to minor trauma to the vaginal mucosa inflicted during intercourse.
3. Lastly the possibility of pregnancy
also needs to be considered. In pregnancy the earliest sign would be slight spotting due to implantation
and invagination of the growing embryo into the endometrium which usually happens around 9 days after ovulation. Rarely it can happen as early as 6 days post ovulation and the duration of the spotting can range from a day to 5 days sometimes.
The pregnancy test done now is unreliable as the amount of HCG
(human chorionic gonadotropin
) in the blood or urine would be below optimum to be picked by the tests. Therefore I suggest you to wait for a few days, preferably till you are due and get blood or urine tested to rule out pregnancy.
Hope I answered your query. Please let me know if there are any other concerns.