 [ Symptoms ] i am 16 not pregnant and every morning for the past 5 months i wake up fine but when i try to eat i get nauseous this does not happen when i wake up past 11 i feel hungry and when i try to eat i feel like throwing it up i have puked a few times on the way to school my stomach growls but my body makes it impossible to eat [ Disease ] hi no offence but you should try and have sex more often its really good for our body is so ok 3 weeks and no sex that would put you around the end of your last period yes you need to take into consideration that some women can get pregnant from any stag of there cycle to the women who have to have sex on the right day hour minute to get pregnant so probably another week 10 days before a test would be best or you could be an early bird for menopause so a simple blood test would tell you that do hope this helps with your problem good luck