Hi Padge. Did she ever pass the placenta? The usual treatment is to continue antiBs until the placenta has been passed. What about mastitis? There is clearly something still wrong with her. Does she have a temp? Could be she still has a retained placenta, or it could be that she lost the lambs because there was already something wrong with her.
How long she takes to recover, if she does, will depend on the treatment you give her. After this length of time, I would be asking my vet for advice. If she has retained the placenta, then she will need antiBs direct into the uterus - your vet will give you these (something like Synulox) and any other advice you need.