Ay, normal lang yan sa 13 weeks, siguro yung movements mo na or gas pa lang, kaya mahirap ma-distinguish pa! Pero para sure at para matulog ka ng mahimbing, best talaga magpa-check sa OB mo at i-mention mo exactly kung paano mo naramdaman, para ma-assess niya properly. You're doing great already na observant ka sa changes ng body mo, yan talaga ang sign ng caring mommy! Keep monitoring and don't hesitate to call your doctor anytime if worried ka, okay? You've got this!