Hi T.,
I had marginal placenta previa (just the tip is in the birthing canal- upside down water drop) and found out around the same time as you. They told me everything will be fine and I may be able to birth vaginally still. Well at my 29 week checkup, they said the placenta hadn't moved and still just to let them know if there was any spotting. I know this is different than yours, since it's complete and you are already on bedrest, but I wanted to let you know my results, so that you know how important resting is.
I was 34 weeks pregnant, had stopped working, and was about to put the nursery together with my mother, when the surprise of my life happened!! I got out of the shower and felt "warm" on my leg, looked down to see blood. I grabbed my phone and sat down in the kitchen. It was repeatedly gushing while I was on the phone with 911. They told me not to get up for anything. I had no pain in my stomach/baby and she kicked every once and a while. After about 1 hr at the hospital, Lily Ray was born by emergency c-section, with localized anesthetics. She was in the NICU @ Elliot for only 2 weeks. Luckily she was born at 6 lbs!! She would have been a big girl full term! She is perfectly healthy now and just celebrated her 1st birthday.
That was quite a roller coaster ride. Had I not listened to my body and quit working, put myself on partial bed rest, then this could have been a different story. I know this isn't a totally happy story for your current situation, but I wanted you know that you're not alone and it can have a happy ending.
Best wishes and rest!! -S.