Bacterial Vaginosis (BV): This condition is characterized by an imbalance of the normal vaginal flora, leading to an overgrowth of anaerobic bacteria. It is a common cause of foul-smelling vaginal odor, especially in the absence of a white discharge. The symptoms presented by the patient, such as a foul-smelling body odor primarily coming from the vagina area without the complaint of white discharge, align closely with BV.

Trichomoniasis: A sexually transmitted infection caused by the parasite Trichomonas vaginalis. It can cause a foul-smelling vaginal discharge, which might not always be described as white. The infection can lead to symptoms similar to those described by the patient.
Vaginal Candidiasis (Yeast Infection): Although typically associated with a white, cottage cheese-like discharge, some cases might present with minimal or no discharge, focusing more on odor and discomfort.
Atrophic Vaginitis: More common in postmenopausal women but can occur in any woman with low estrogen levels, potentially causing vaginal dryness, itching, and a foul odor.

Pelvic Inflammatory Disease (PID): A serious infection of the female reproductive organs that can cause a range of symptoms, including foul-smelling discharge. PID is a significant concern because it can lead to severe complications like infertility and ectopic pregnancy if not promptly treated.
Cervicitis: Inflammation of the cervix, which can be caused by infections and might present with abnormal vaginal discharge or odor.
Endometritis: Infection of the endometrium (the lining of the uterus), which can cause a range of symptoms including fever, pelvic pain, and abnormal discharge.

Foreign Body in the Vagina: Although more common in children, a forgotten tampon or other object in the vagina can cause a strong, foul odor.
Desquamative Inflammatory Vaginitis (DIV): A rare condition characterized by a purulent vaginal discharge and significant inflammation of the vaginal walls.
Malignancy: In rare cases, a foul-smelling vaginal discharge can be a symptom of a gynecological malignancy, such as cervical or endometrial cancer.

For bacterial vaginosis, metronidazole or clindamycin are commonly prescribed.
Oral probiotics may help in restoring the normal vaginal flora, but their effectiveness can vary.
Vaginal probiotics or suppositories containing lactobacillus may also be beneficial in some cases.
It's crucial to diagnose the condition accurately before starting any treatment, especially in a pregnant patient, to ensure the safety of both the mother and the fetus.