Not an expert at all, just made it through our first time lambing with 4 ewe.
We had a similar situation with a ewe this year, although the first lamb lived and she was very interested in that one. We turned her at two hours to latch the lamb on as he wasn't latching on when we held her still and put him to the teat. He has fed ok since then. We kept them penned up in a 4x 6ft hurdle pen for about 4 days, then had them in a 6x 6ft hurdle around a shelter for a further 3 days. The lamb is still distant from mum, he wanders off and she isn't good at calling him back but they do find each other, he does feed from her and he is doing well.
Good luck with yours, you may still be able to have mum raise him.
Dans