Hi,
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The Depo shot taken within 1 week of scheduled date usually works in giving you the protection. However, it is not uncommon to find women getting pregnant while being on hormonal contraceptives. Your symptoms (brown discharge, nausea, dizziness, headaches, slight cramps, low back pain, diarrhea, spotting, vomiting) could be suggestive of possibility of pregnancy. Wait and watch for your next periods. Look out for development of any other new symptoms suggestive of early pregnancy. If you suspect to be pregnant, visit your doctor/gynecologist for examination (to look for signs of pregnancy changes in body) and getting a blood HCG test done (to confirm/rule out pregnancy accurately). Take adequate rest. Drink plenty of water. Maintain healthy diet. Avoid caffeinated and carbonated beverages.
Other possibilities include your bodyâs response to the hormonal content of the Depo shot. The blood/serum HCG test done would help to confirm if the symptoms are due to pregnancy or due to the hormonal content of Depo shot.
Take care.