Placenta Previa

I just had my anatomy scan yesterday at 19w 1d. Baby and I are both doing really good the only thing is they said I have Placenta Previa. They really didn't tell me too much except that most cases resolve themselves throughout the rest of the pregnancy. 
The only thing she told me was we weren't allowed to have sex and I wasn't allowed to travel. 
I wish I would have asked more questions but I was so caught off guard that I froze up and just listened. 
Has anyone been through this and what are recommendations to helping the placenta up.