Hi, my daughter who’s 14 1/2 had her first period 6/7 weeks ago. No sign of second one. Internet says 90% have a second one within 40 days, though most will be irregular for for couple of years. I can’t remember how I was, though I had a late start too. Am I wrong to worry? She’s my eldest, healthy weight and reasonably active. All other developmental signs there. No major acne or body hair to suggest PCOS.