First thing, you must exclude possible pregnancy by undergoing one home pregnancy test or blood test
for beta-hcg. Though, failure rate of depo shot is quite low (0.3%).
Depo shot has several side effects like irregular spotting, delayed period or amenorrhea
, headache, abdominal bloating
or cramp etc. It is more common with first time user.
Foul smelling occurs mostly due to vaginitis, associated with bacterial infection. One vaginal swab test can confirm this. Kindly, consult with gynecologist for overall check up and take proper antibiotic
treatment to get rid of this.
Till then, you would maintain genital hygiene properly. Good luck.