Every month for the past couple of years I've had light pink/brown spotting for 2-3 days around the time of my period, followed by 1-2 days of no bleeding, and then my period starts. I've had blood tests and an ultrasound scan but all normal and GP just says it's probably just harmless hormonal changes in my cycle.
I'm in my early 30s and my periods are regular every month on a 30 day cycle (give or take a day here and there) and I typically have light period bleeding. No other symptoms apart from period cramps on the day my 'actual period' starts.