Anterior placenta? Plz comment!?!

This is my 5th pregnancy. With all my otjet 4 kids i felt them all moving and kicking by 12 weeks and could find there heartbeat very easily w my heattdoppler. Im about to be 16 weeks and i have felt nothing with this baby and its very hard to find her heartbeat.....

Maybe i have an anterior placenta ? Idk. My question is, how many weeks were you when the dr told you you had an anterior placenta (if you did have one)....

Plus ive been getting alot of intense sharp pains in my lower stomsch and throughout my stomach. Im just super worried something is wrong. This isnt normal for me as my other pregnancies were all very similar....