Hi mama! Ang first movements na yan (quickening) parang butterflies, bubbles, or light fluttering lang talaga, hindi pa sya sobrang obvious sa 15 weeks kaya yan ang nararamdaman mo, super normal! A few of us first-time moms din nag-confuse kung movements ba talaga or gas lang, pero ang good sign is yung consistent pattern at umibalik-balik talaga, so keep track mo kung kailan mo feel. Since you're having some discomfort pa rin, mas okay if ma-mention mo to your OB sa next checkup para ma-clear lang lahat, pero walang alalahanin, yan talaga ang feeling ng baby na lumalaki. You'll feel stronger kicks soon, especially towards 20+ weeks pa, kaya enjoy na ang sweet stage na ito!