Ay mama, totally normal yan sa 26 weeks, bawat baby talaga may sariling schedule at hindi pa consistent ang movements! One of my mum friends said ganyan din siya, nag-worry pa siya dati kasi parang hindi regular, but OB niya assured her na normal lang habang lumalaki pa ang baby at maraming space pa. The movements will become more predictable around 28-32 weeks onwards, pero ngayon aadjust pa talaga sila based sa activity mo, sleep, kung kumain ka, lahat. If you're really worried though, best to mention it sa next check-up mo para peace of mind, pero most likely you and baby are doing just fine!