If she can still get around and eat/drink I would leave her until she has lambed. I normally leave my ewes (shetlands) for a day or so before I tip them up to do their feet, unless there s a reason to do it earlier. Just so that her insides can rearrange themselves post-lambing.
If she has footrot or scald, a long-acting Antibiotic like Alamycin LA should sort her out, especially if you are not able to catch her quickly again - my ewes become a bit more flighty with their lambs.