Confused.... could it be possible?

Bekah • Wife... And blessed mommy of 3 amazing kids... Due DEC 23rd with #4
Ok so my periods have never been regular... so my last period was in october of 2014...then a week ago i started spotting a light pink and then it turned a brownish then back to a pinkish.... then stopped... today i was at work and i tried to eat breakfast and i got really nauseous. Everything i tried made me feel icky. Could it be possible that i might be preggers?