It is possible to detect some sexually transmitted infections (STIs) through a blood test, but not all of them. Symptoms like white discharge may indicate a bacterial infection called bacterial vaginosis. It is important to see a healthcare provider for an accurate diagnosis and appropriate treatment. Some STIs like chlamydia and gonorrhea can't be detected by blood tests, so it's crucial to seek medical advice for proper testing and treatment. Don't hesitate to consult a healthcare provider, as clinics are safe places to visit even during a pandemic.