baby gerak

hai mommy..saya cuma nk tnye..sye dah 16 week..mse start 12 week sye dpt rse ade mcm bubble dlm perut...sbelah knan dkt dgn ari2..org kata tu rse bby gerak..sye dpt rse gerakan tu smpai 15 week..skrg dah 16 week 4 hari dah tkde rse bubble tu..normal ke ye??ataupon baby nye dah beralih tmpat..mksud nye tak dduk dkt sbelah knan ni dah..skrg ni bile sye rse kt sbelah kiri,mcm ade keras jee kt sbelah kiri ni..bile sye tekan,sye dpt rse mcm denyutan..adakah tu denyutan jantung baby??