Agree with walkin they are the 2 likely causes I'd be thinking. Tho 'too short a trim' generally doesn't cause those type probs, usually just about thinning sole. That must have been some trim your horse got walkin!
Keep her on soft footing somewhere that she's happy to lie down if she feels the need. Keep her off rich grass & feed, just on soaked hay, until you have the vet rule out laminitis at least. Tell us more about her condition, diet etc & post hoof pics if you'd like more opinions.
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