Wacky period???

Bianka
I never experience spotting during/before/after my period. I have always had regular periods and what my dr calls "perfect periods" my periods are exactly 28 day cycle since I was 15 years old (now 27). I
Am experiencing spotting 2 days before I'm supposed to start my period?? And I'm so exhausted!!! I've never felt so drained!! Could my period be changing now that I'm getting older? When is a good time to take a pregnancy test