At what age do most of you suspect you hit peri-menopause? I will be 38 in 10 days and my cycles have been horribly short for probably close to 5 years. I am lucky to hit 24 days. Most months I'm in the 21-23 day range...then I spot for 7-10. Drives me nucking futs! I had thermal ablation 7-8 years ago, so that likely explains how light my actual flow is. I have endometriosis, but that doesn't explain the short duration of my cycles. I've likely had endo since my very first period and my cycles used to be in the 28 day range.