Thanks for the query.
I understand your concern.
If you got the depo shot during your menstrual period, it will give protection through out the menstrual cycle and the possibility of pregnancy is less.
If you took the shot in the middle of the month, the possibility of pregnancy cannot be ruled out.
Brown discharge can be a side effect of depo shot.
If you want to rule out the possibility of pregnancy, better to go for urine pregnancy test three weeks after the date of intercourse.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.