Don't worry, everything is fine with you. Just repeat the test in about a week to confirm the result. If it's still negative, it's very likely that the symptoms you notice are due to another reason, not a pregnancy. If you are in doubt, it is best to contact your doctor for an ultrasound and an exploration, although if the pregnancy is very early you will not be able to see anything on the ultrasound and you should wait a few weeks.
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