Oo normal talaga yan, mama! Breastfeeding really does delay or skip periods kasi ng hormones, and honestly it's different for everyone, some moms get regular right after, some it takes months pa. Since you got yours in December at tapos ulit ngayon wala, it could take a few more months pa bago talaga mag-settle into a pattern, especially if exclusive ka pa rin. That said, para sa peace of mind mo, better check with your OB just to rule out anything else, kasi 25 days delay is worth confirming talaga. Wishing you all the best, and don't worry, maraming moms din dito ang nakaexperience ng ganyan!