Yes, any worsening of or new symptoms, get vet.
For future reference, tipping sheep up this close to lambing is not advised.
Even if I had a ewe totally lame, I would avoid tipping her. With a bellyful of lambs, the compression of the internal organs when she's tipped could cause issues. (Shearers ask you to hunger sheep for shearing for some hours before shearing because a bellyful of grass can cause issues when tipping them, especially tups and unbred sheep who will be in good condition.)
It's pretty normal to have some slight lameness in the run-up to lambing. Friends who've been pregnant point out that as you get heavier and heavier, everything aches, and especially your feet
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