So me and my girlfriend had unprotected sex 6 days ago and shes having all the symptoms of pregnancy . breast tenderness , chest pain , tiredness , cramps , headaches , and food cravings . but she took a pregnancy test today and it was negative ?

Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. Test is very reliable by 3 weeks after sex (3 weeks after when conception might have been) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early, such as less than 2 weeks after conception.

A bit early: It’s a bit early to have symptoms of pregnancy at this point.