Aww mama, yes may chance talaga na tumaas pa yan! A few of us preggy friends din nag-experience ng low lying placenta sa mid-pregnancy, at by third trimester tumaas na siya, ang uterus lang lumalaki kaya yung placenta may space to move up pa. Best thing is follow-up ka ng OB mo regularly para ma-monitor kung kumikita na, at avoid heavy lifting or strenuous activities muna para safe, okay?