Placenta previa

At 18 weeks I had an anatomy ultrasound which also revealed that my placenta is covering my cervix. I was told that I may have to get a c-section. She informed me that it’s on the front side of my belly but only the bottom edge of the placenta is covering the cervix and it is possible the placenta could move as my uterus grows. I will be 26 weeks on Sunday 4/21 and I have another ultrasound scheduled for 28 weeks to see if the placenta has moved or not. I was told that most of the time it does move and I shouldn’t worry but I can’t help to worry sometimes. Have any of you experienced this? Or going thru this now?