New member, DLA renewal, please help

Hi All,
I received a DLA renewal pack on the 14 Jan (the accompanying letter was dated 1st Jan- I was surprised that they work bank holidays), and I'm in a blind a panic- it only seems like five minutes ago that I underwent the stress of the original claim. Apologies in advance if this is lengthy. I'm sure the info I need is somewhere in the members guides, but I can't seem to find it, and would really appreciate your input. I was awarded HRM and MRC for two years, which ends on 21/05/15. The letter I have now received is DLAADULTNEW and the form is DLA1A ADULT January 2014.

Firstly, when making my original claim I understood that the idea was to describe the help I need, whether or not I actually received it. I did so, but I'm not receiving some of the help I described (there are reasons for this). I'm using the mobility component, but no-one is providing the care element. So if I describe the same needs/help again without actually having received that help, do I run the risk of my claim not being taken seriously, or not being believed?!??

Secondly, could somebody please tell me where to find the guide for supporting evidence? Since making my original claim I have accumulated three large boxes of letters from the hospital, various specialists, therapies etc. and need guidance filtering through these. Two calls to the DWP for clarification confused me further, as I got two conflicting answers: first guy said "just write that your condition hasn't changed"-it has, but my overall mobility/care needs haven't. Second person I spoke to said "they are not interested in what you said last time, it's regarded as a fresh claim." But surely they would be interested in the progression of the original illnesses???!

Lastly (I think/hope), is there a guide which gives advice on describing the overall effects of multiple illnesses? My original condition involved four admissions for a total of seven weeks in the space of three months. This has now stabilised, but needs a lot of monitoring, medication, dietary needs etc. to try to keep it stable. Meanwhile, although I described other separate pain and symptoms in my original claim I have since received diagnoses for these, including the need for hip replacement, osteoporosis and a whole lot of other stuff. Much of the stuff is no big deal in itself as an individual illness, but juggling the demands of the whole lot together is a nightmare, and I think I need to get this across.

Apologies again for the length of this post, and many thanks for your patience and any suggestions you can give.