complete placenta previa will most DEFINATLY require a Csection, even BEFORE you start getting contractions. you will likely be getting a csection 2 wks early, Unless it corrects itself, i hope it does!
My mom had placenta previa with me and she was in the hospital for 3 months on bedrest. The placenta did move out of the way on its own close to before I was born and I was nowhere near premature, I came 2 weeks late.
If if doesn't dorrect itself, a c-section is required. When I was diagnosed, (I had a partial previa) I was put on pelvic rest, and sex was a no-no. Mine luckily corrected itself, but I *think* if you have a full previa present in late pregnancy, bed rest is pretty standard, but don't quote me on that. I would avoid lifting anything over 5 pounds.. I didn't look at the link losingMyMindInGA posted for you, but I am sure that has great advice, and is likely more accurate. Best of luck!
The placenta can move and at this point you have plenty of time. However if it IS covering the cervix when it comes time for labor you will most likely have to have a cesarean.
This link has some good info:
http://www.babycenter .com/0_placenta-previa_830.bc
remember to remove the spaces