I have always had regular cycles, less so after the birth of ds, now 2, but always 24-29 days long (I chart on an app). Period started today on what would have been day 16. I have a cervical erosion which has never bled before but this is a proper amount of bleeding. I'm mid 30's so not perimenopausal. Do I need to see my GP or do I see how the next few cycles go?