Hi Evelyn Kim
Welcome to HealthcareMagic.
Bad odor of vagina can be due to infection.There is not much relation between conception and vaginal infection
, but infection causes adverse effects in pregnancy
.I advise you to visit your Gynecologist and get examined.Few tests might be done to know the organism causing infection and antibiotic course can treat this condition.
Hope I answered your question.If you need more information feel free to mail me.