Oo, normal lang yan ate! Marami sa amin na mga preggy nag-experience ng ganyan, some babies talaga prefer one side, either dahil sa amniotic fluid position or comfort lang nila doon. A few of us tried changing positions (like lying on the left side para ma-encourage sila mag-shift) pero honestly, basta feel mo ang movements at active ang baby, it's usually fine.
Pero since first time mo, best to mention it sa OB mo sa next visit para peace of mind mo, they'll check kung okay ang baby's position at kung may concerns lang para sa delivery, yun ang importante. You're doing great, mama!