Just looked at the list, himalayan, and I don't see that its length is relevant seeing that the vast majority of websites are either pure information leaflets or relating to very specific problems that are not relevant to the OP (e.g. the use of medication in pregnancy). Adding another 50 of those wouldn't make it more likely that the OP could get help. I think there is a fair chance if you turn up at a support in pregnancy organisation and ask for help with your 13yo that they will send you on your way.
?Anxiety UK - info for both adults and children suffering from anxiety, as well as for their carers, families and friends- this is an information website, not a chance for the OP to ask for help with her specific problems
?Association for Post Natal Illness - info for women with postnatal illnesses- not relevant
?Association of Child Psychotherapists - help finding child psychotherapists- not relevant, her child is already being seen
?Aware Defeat Depression - info, advice and support for people in Northern Ireland- not relevant unless OP is in Northern Ireland
?Beat - supporting people affected by eating disorders and campaigning on their behalf- not relevant
?British Association for Counselling and Psychotherapy - help finding psychotherapy- might be helpful if the OP can afford to pay for them, but not much good if she can't
?Cams Den - NHS site providing resources for parents and teachers to help children understand mental health issues- just an information site
?Depression Alliance - network of self-help groups, plus information and support- possibly helpful if the OP is depressed but not much good for the practical issues
?Depression in Pregnancy - support for women experiencing antenatal depression- not relevant, the OP is not pregnant
?Facing Parenthood - specialist psychotherapy and relationship counselling linked to fertility, pregnancy, birth and parenthood- not relevant
?Maytree - London-based free respite centre for anyone experiencing a suicidal crisis- the OP is not suicidal, she is being attacked
?Mental Health Forum - online space to discuss anything related to mental health- but if she can't discuss it on here, presumably another online forum isn't much good either
?Mental Health Foundation - information for anyone affected by mental health problems- only information website
?Mind - local associations across England and Wales; drop-in centres and counselling this is the only one that looks like a possible, but can be hard to access ime
?MoodGYM - intro to cognitive behavioural therapy, by the Australian National University CBT will only work if the dd agrees to do it
?Perinatal Illness UK - for women with psychological illness during pregnancy or after not relevant
?Post Natal Depression & Puerperal Psychosis - support for new mums and their partners- not relevant
?Rethink - information about medication for mental illness during pregnancy- not relevant
?Royal College of Psychiatrists - accurate information about mental illness after childbirth- not relevant
?Samaritans - trained volunteers provide 24-hour confidential support- yes, good in a crisis, but not someone to lean on longterm
?Sane - help and information for anyone experiencing mental health problems- these may be helpful, or they may not; depends on the specific help they offer and how overstretched they are.
?Scottish Association for Mental Health - services for people in Scotland- not relevant unless the OP is in Scotland
?StepChange Debt Charity - helping people to resolve debt & highlighting the links between debt and mental health- not relevant
?The Birth Trauma Association - support if you have a traumatic birth experience- not relevant