It doesn't sound like it, but go to your Dr or clinic and have a pregnancy test to answer your question.
you are not supposed to have a period if you are pregnant.
it depend did you have sex
never
Well it could be that you are pregnant, so take a test. But you could just have had a short period
Most probably not, even with such a short period.
Some women experience irregular periods, but if there is a chance you are pregnant, your "period" could actually be spotting.
Possibly, yet the idea that you had your period, no matter how long is encouraging.
You should take a pregnancy test to be sure.
You could be. I would recommend taking a home pregnancy test.
If you spotted an aurora that lasted several nights, it could indicate increased solar activity such as a geomagnetic storm caused by solar flares or coronal mass ejections from the sun. These events can lead to an extended period of heightened auroral activity in the Earth's atmosphere.
Yes, you could be. This sounds a lot like implantation bleeding. If you haven't, take a pregnancy test.
If there was unprotected intercourse in there somewhere then yes.