Foul smelling vaginal discharge
is mostly suggestive of vaginal infection
). It should be confirmed.
I suggest to consult with your gynecologist for pelvic exam & vaginal swab test. It will be more worthwhile.
Maintain genital hygiene properly, take oral Metronidazole tablet and vaginal suppository at bed time. Use condom during sex.
In such cases, your partner should be treated properly. Be well and good luck.