Partial previa ? 18 weeks 4 days

Erin • 26. Married.First baby.

Ultrasound yesterday and my baby boy looked great! But they told me I have partial previa where half of the placenta is on top of the cervix which if it doesn't move will result in a csection. No prob ! But she scared me saying if I start bleeding to go straight to the hospital. I haven't had any bleeding this entire pregnancy or any problems at all! Should I be worried ? Have any of you had any complications that result from this? I'm going back in 4 weeks to see if it had moved up and away from the cervix. Now that's all I can think about and am checking myself constantly. Help!