Should I take a pregnancy test?

I'm on the pill but have had brown spotting for the past week for no reason. I take my pill at the same time every day so it's not that I missed one or anything. I had my period two weeks before this spotting started and had sex five days before. I've also been suffering from unprovoked nausea, although that could be completely unrelated. Should I take a pregnancy test or is this nothing to worry about?

Vote below to see results!