Ay, super normal yan, mama! One of my friends was also counting kicks around that time and her baby was equally active, ang OB niya din sabi walang problema, active babies are actually good signs na healthy ang utak at nervous system nila. 18 kicks per hour is honestly impressive at reassuring, kaya you're doing great monitoring pa lang, pero since your OB already gave the all-clear, just enjoy na lang the feeling ng movement mo, ito na ang first bonding mo with baby!