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during peak ovulation time may result in conception. It may take 8-14 days time for the fertilized ovum get implanted into the uterus
. The fertilized ovum grows in size as it moves from fallopian tube
to the uterus. A hormone called HCG is secreted which helps to detect pregnancy
Sometimes due to lower concentration of HCG in the urine, false negative tests occur. You can wait for some time and repeat pregnancy test with the specimen of your early morning mid-stream urine ( HCG concentration is higher ) to confirm your pregnancy. You can get a blood test
done to detect HCG.
You can also visit your gynae and get clinically examined, USG done to detect pregnancy. Have nutritious diet, take care.