Should I wait???

I have been spotting for a week now. It's not even enough to fill a regular tampon. It's basically only when I wipe I can tell. I have been tired and some days I have been kind of nauseous. I dont know if the tiredness and nauseous are all in my head since I know those are signs of pregnancy. I am supposed to start my period today. Should I wait to take a pregnancy test till the end of the week to see if I do start my period?

Back story-

I had a LEEP surgery back in August because my OB was worried I could develop ovarian cancer. I have PCOS and before the surgery I wasnt having regular periods. Since the surgery I have had them though.