When did you do your last test?
Test again now if its still negative then just relax your stress could be holding back your period good luck p.s i was 4 weeks pregnant before i got a positive result also you may just know in your mind when your pregnant i get this everytime im pregnant but not everyone does

“listen” to the signs that your body gives you even before having a pregnancy test or going to the gynecologist.
*The delay of menstruation.If the menstruation still exists we are surely not pregnant.
*Visible change of your breasts; they become even bigger than they were before the period of menstruation and they ache.
Most women confuse this ache of the breasts with the one they have before menstruation comes.
*The urination is frequent at the beginning (in the first four months of pregnancy) and this represents another important sign that you are pregnant.
*Even if you aren’t that kind of person who eats all the time this doesn’t mean that an unjustified hunger and an emphasized appetite can’t represent a pregnancy sign. Remember! Don’t rely on this fact as the continuous hunger can appear because of stress too.
*Another frequent sign of pregnancy is a constant, unjustified estate of fatigue. This fatigue appears because of the quantity of progesterone hormone present in a high level into your body.
*If you observe that weird smells such as the one of gasoline or blacking begin to attract you, this is an unfailing sign of pregnancy.Most pregnant women also admit that they can’t stand the smell of coffee or tea.
*Beside of having a darker color than usually, teats begin to be very mellow and sensitive at any touch. The sensation is similar to the one you have before the menstruation appears.
*Your body temperature has been higher than usually for more than 18 days? That’s an unfailing pregnancy sign. This temperature chance is due to the presence of the hCG hormone in your body.

If you have a lot of these symptoms and your test comes back negative, don't rule out pregnancy. False negatives are rare but possible, and can be caused by over-hydration. Wait a few days and take another test, first thing in the morning.

If your test is negative and you still think you might be pregnant, repeat the test in a week—maybe you conceived a bit later than you thought. If you are not pregnant but still missing your periods or having odd symptoms, your doctor or midwife can help you determine the cause.