Tink, if you want to talk it through or ask any questions, pop over to the Special Needs boards. There are quite a few people over there whose dcs have dyspraxia.
Have you been on the Dyspraxia Foundation's website? its really useful.
You don't have to go via the school, your health visitor or GP can refer you to Occupational Therapy to have her assessed. Ds1 was assessed in February this year, but fell right on the boundary of the cut-off for a diagnosis. He really enjoyed the assessment, lots of playing games with balls, balancing on things and playing with playdough. He wanted to go back and do it again! 
The SENCo will be able to observe your dd in class and if necessary can put her on School Action and set up an Individual Education Plan (IEP) which involves setting some targets that take into consideration any problems she's having and sets out what support the school is going to provide to help her reach them eg, ds1 did a fun programme in school for a few weeks to help his co-ordination and handwriting skills. If she needs any support from outside professionals, such as physio or occupational therapy, she will be put onto School Action Plus, which is basically the same thing, but with an acknowledgement that outside professionals are involved and should be kept in the loop regarding her targets and progress etc.
If you have any worries or concerns about the process please do pm me, I'd be happy to help.
Actually, one of the friends I was with this weekend has it quite badly, she's a photography lecturer, but is currently retraining to teach creative arts to children with special needs. Not many people realise how many areas it affects, most people think dyspraxia just means you are a bit clumsy and possibly fall over a lot, but there's a lot more to it than that.
I think ds2 might have some degree of dyspraxia too. He has hypermobile joints and his knees and ankles regularly give way under him for no reason. He's also got a really loud voice, is really over-sensitive emotionally, is hopelessly uncoordinated and still can't ride a bike or swim. (he's 7)