This is the thing, it's not just referrals from 'evil tories on the internet' that don't like Sarah. When it's coming from people that know you, from professionals at school and at hospital, what's the excuse then? Are they all tories too? Or do they just not like Sarah because she's a single mum?
When you're getting multiple referrals from places that have no link to each other, you really need to consider that there may just be some things to address with yourself, and at home. Even if you believed the 'overzealous' nonsense - it can't all be overzealous people. You're causing concern in a number of individuals, maybe look at what is really wrong here.