DD is 9 and has had trouble with anger and tantrums on and off since the end of year R. They used to be very much related to school issues (although she had them at home)- she struggles with friendships in particular and is very oversensitive. Things usually calm down over holidays, but this summer the opposite has happened - she is constantly angry and rude, and has at least one full on tantrum a day which involves screaming, pushing and shoving. She is very aggressive and angry towards her sister but also to her dad and I. She rarely shows her anger out of the home and is usually very polite to others (although this is beginning to change a little). We're at the stage we need professional advice, partly as I'm worried she'll hurt her sister. We've briefly seen an educational psychologist (mostly about her difficulties with friendships and lack of concentration) who really wasn't very interested as she's not a "failing child" and academically is well within limits. The implication was we were overanxious parents. We've had a consultation about how to manage her tantrums with a behaviour specialist and this hasn't really helped either - we've tweaked our approach a bit but basically we're not doing anything unusual. Sanctions do nothing - she just gets angrier. We try and praise the good (or even the OK) but to be honest there's precious little to praise at the moment. She can't articulate why she's so angry - blames everyone else and says everyone's mean to her and bullies her (they're not and they don't - this generally means they don't agree with her or she's not getting own way all the time). Most of the time she's defiant but occasionally she breaks down and is really contrite and sad, which breaks my heart. There have been no major changes in her life. Eats and sleeps well and is healthy.
Who would be the best professional to turn to? We will probably see a GP next week but I'm very aware that anything on the NHS will take forever and am happy to pay to see someone privately as this is making us all miserable and I'm worried for her future. I'm just at a bit of a loss as to who? I'm presuming some sort of psychologist but educational? behavioural? clinical? What approaches / qualifications should I be looking for? Any suggestions very gratefully received.