mine is low-lying so i have to go to have a follow-up u/s at 28wks (4wks from now). i was concerned but felt better after i talked to my obgyn.
like the last postee said, as long as it does not cover the exit to the womb we should be fine. it should move as the uterus stretches.
even though my placenta is not in the front i still feel baby moving alot on the bottem, all the time.