Period was only 48 hours

Sipu

So i started 3 days ago and it was light pink then went to darkbrown the next day, this isnt normal for me, and now its gone.

My period usually last for about 4 to 5 days.

But for the last 2 week i been feeling like i need to puke but couldn't and that stopped once i started my period.

Could i be pregnant? Or is this just a weird cycle this month?