Could you be pregnant are 21 days late but four negative pregnancy test and neg blood done at day 9 currently running a low grade temp experiencing symptoms?

A negative blood pregnancy test at 9 days post intercourse is considered reliable and accurate, and it is unlikely that you are pregnant.

However, if you are experiencing symptoms of pregnancy, it is possible that a later test could be positive.

Some conditions can cause a false negative pregnancy test result:

- Testing too early: Pregnancy tests are most accurate when taken after the first day of a missed period. If you take a test too early, the level of hCG in your urine or blood may not be high enough to be detected.

- Using an expired or defective pregnancy test: Pregnancy tests have an expiration date, and using an expired test can give you inaccurate results. Additionally, some pregnancy tests are defective, so it is important to read the instructions carefully and follow them exactly.

- Certain medical conditions: Some medical conditions, such as polycystic ovary syndrome (PCOS) or thyroid problems, can affect the levels of hCG in your body, leading to a false negative pregnancy test.

- Miscarriage: A pregnancy test may be negative if the pregnancy has ended in a miscarriage.

A low-grade temperature can be a sign of pregnancy. However, it can also be a symptom of other conditions, such as an infection or ovulation. If you are concerned about your temperature, it is important to see a doctor.

If you are experiencing symptoms of pregnancy, it is important to see a doctor to determine if you are pregnant and to rule out other potential causes of your symptoms.