Yes. DD was cutting and overdosing at 15, preceded by food restriction.
She's 26 now, she took a first from Cambridge and teaches English at Secondary level. Form teacher to Y11. She has outside interests and a lovely boyfriend.
She hid it from us for six months, and the extent of it. CAMHS declined services except for group therapy. She was very anxious and had become depressed.
We found a consultant psychiatrist specialising in adolescents. She hadnsome counselling and was then put on anti-depressants. She also had a full health screening which identified low vitamin D and iron. Counselling and therapy continued for a year with a shirt course of day patient drama and music therapy. After a year she was assessed for ADHD and ASD. She has ADHD and some ASD traits but not enough for a diagnosis. The ADHD was medicated. She has had a lot of therapy and also now a diagnosis of dyspraxia and hypermobility.
As soon as the ADHD diagnosis was confirmed so many pennies fell into place and with hindsight she had always been anxious. No issue was ever picked up at school. She masked well and was high performing. The pressure of juggling 11 GCSE's where she was expected to get A*s became too much. Not from us.
We found there was zero NHS support. CAMHS were hopeless and at our second encounter when the ADHD had been diagnosed a supposedly experienced CAMHS nurse told us she was too old to get a diagnosis of ADHD. Our GP told us to get her a therapist off the Internet.
Fortunately she was covered by BUPA which picked up about £10k of £20k of costs.
Provision of MH care for young people is an absolute scandal and had we not had the money, I doubt dd would have recovered as well and made as much of herself. It's heartbreaking.
If you can, I'd remortgage. If you can't, you need to get your MP involved.
Finally, it really isn't a usual expectation that teenagers are manipulative.
If you look for private therapy looknfkr provision under an umbrella organisation like Relate or some of the other charities.