Anatomy scan

I am 21w0d as of today, and just got back from my Anatomy scan!.
Baby looks good no anencephaly or spina bifida and no markers for Down syndrom, the little one weighst ONE POUND already!!!!!. We got a few pictures of baby which i will upload later :) .....Everything seemed fine BUT there is ONE concern... the babys placenta... or should i say placentaS because apparently i have TWO of them..... it looks like my placenta is SPLIT in half but connected with abnormal blood vessels..... That means i am back to Being High Risk, i will  have ultrasounds every 4 weeks, and baby will be delivered AT LEAST 3 weeks before my actual due date......  Pelvic rest for the rest of the pregnancy, and i could end up being put on Bed rest ( at home or the hospital) if the abnormal growth of the placenta continues....I am beyond crushed at this moment..... i just pray my little miracle stays strong :(
The second concern is that i am A FULL placenta previa {placenta/s cover my cervix completely} ALSO the placenta has attached itself to my old C-section scars. Thats also a big concern, it could cause heavy bleeding during the C-section, which will end up in me having a hysterectomy. I am at a complete loss at the moment and dont know what to do/think. I can't even Talk about it without crying. I DONT care if i lose my uterus during the C-section as long as baby is going to be OK and developes healthy....