You had blood test for STDs and came back negative but think there is still something wrong?

Not all STD's are routinely tested for by a blood test. A complete examine should have included urine samples (some physicians still use cultures so they may have opted for swabbing the genitals instead).

Even so, some diseases may not show up on the test immediately. This is especially true of syphilis which requires 7 to 10 days from the appearance of the first symptom ( a painless lesion, often on the genitals, called a chancre) to the time in which the serological (blood) test will be positive.

If the symptom that prompted you to get the exam has not gone or other symptoms have occurred go back to your physician or health department and let them evaluate you.