Placenta previa help!

Jess

At my 20 week ultrasound I was diagnosed with complete placenta previa (anterior.) The doctor I spoke to said she doubted that it would move up on its own but still wants to check back at 28 weeks. She started scaring me with talking about Placenta accreta because my previous C-section. Of course I got home and started researching how I might need steroid injections, amniocentesis and be on bed rest. I could experience bleeding and that I would have to have my daughter via C-section early. All I can do is fear the worst at this point. I am at 21 weeks as of yesterday and haven’t had any issues so far and I’ve been put on pelvic rest for 8 weeks. Those who were told at 20 weeks that they had placenta previa did yours correct itself? I’m also terrified of placenta accreta. Please help ease my mind!