Even if you experience these symptoms, you should wait till the first day of your missed period to take the test. (or a couple of days more if you have irregular menses) This is because even if you are pregnant, the hormone HCG, or Human Chorionic Gonadotropin could be too low to come up in a home pregnancy test. While blood tests are more reliable, they too, need to detect a certain level of HCG to give a positive result.

Sources
Johns Hopkins Medicine
Medical News Today
Healthline

Disclaimer: This article is only for information, and is not a substitute for medical advice