Answer: "Nausea can happen as early as two weeks into a pregnancy or it can start a few months after conception. Not everyone experiences nausea and there are various levels of nausea. You can have nausea without vomiting—this changes from woman to woman."
Explanation: https://my.clevelandclinic.org/health/articles/9709-pregnancy-am-i-pregnant#:~:text=Nausea%20can%20happen%20as%20early,changes%20from%20woman%20to%20woman.
