Mama, low placenta at 14 weeks is actually super common at this stage, most of the time it moves up on its own as your uterus grows, so maraming chances talaga na tataas pa! Since this is your second baby, I'd really suggest talking to your OB about it sa next check-up para ma-monitor properly, especially since you've had a previous delivery. Pero don't stress too much right now kasi maraming kaibigan ko na nakaranas ng ganito at lahat nag-resolve by third trimester, okay?