Hi just wondering if this happens to anyone else but for the past 4 months I've been charting I seem to spot/bleed the same time every month in my cycle cd12 I then ovulate cd 18-20 ( I have a 33 day cycle) It only lasts 2-3 days and then I ovulate as I use opks. I have been drs and had blood tests but all normal so has does anyone experience this also?