If a teacher or adult asks you if your pregnant, you should: say yes say no ask if they are

It's best not to answer that question, depending on the situation.

If you are pregnant then yes you should because then you wont have to hide the fact that your preggers and you can take better care of the baby while its still in the prenatal stages

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle