Is this a pregnancy symptom?
Answers: yes. It's a very adjectives one BUT just because you are tired doesn't mean that you are pregnant. There are hundreds of reason that you could be tired..
Yes, but it is also a sign of getting your period. The funny thing going on for early signs of pregnancy is pretty much all of them are also signs of PMS.
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It is also a sign of individual overweight - or just plain laziness.