I have recently got back into running (been doing it on and off for 8 or 9 years) and have noticed that I am spotting during and after most runs. I am 44, so I know that period irregularity and mid-cycle spotting can be due to peri-menopause symptoms, but this is only occuring after a run session. I have started to wear a liner when going out on runs as I know it's going to happen and so I can see exactly what's happening. When I finish my run, I do feel very slightly crampy, but nowhere near like period pain. A couple of weeks ago it seemed to bring my period on, which was due in a day or so anyway. Just wondering if anyone else has come across this before I pay my GP a visit?