I'm really sorry Clementine hasn't been well, and that the vet visit was so unhelpful. I'm glad she's been eating some veggies! It does sound like it's her moult that's bothering her, with those strung-together poops. The water in her veggies will help with that, at least. Sending her lots of vibes.
Also, if you look into laser therapy for her, do keep in mind that the professional devices vets use are a lot stronger and more effective than at-home devices, as the professional ones can reach higher wavelengths.