Advice Please Re Claiming Carers Allowance For My Mum While Receiving PIP Myself

Hello I wonder if anyone has any experience of or advice please? My elderly mum and I live together, she is 81 and receives the high rate Attendance Allowance on an ongoing basis because of severe arthritis. I am 59 and ex airline staff who shattered his spine after falling backwards over my work suitcase back in 2010. I've had many spine ops and two different types of spinal cord and dorsal root ganglion stimulators implanted and subsequently explanted due to issues. I was receiving standard rate PIP for daily living and enhanced for mobility. I have just been through my PIP review (took 3 months from start to finish) and on a paper based review I have now been awarded ongoing enhanced rates for both daily living and mobility. Now I struggle a lot myself and in truth my mum helps me with lots of things and in return I help her (it really is like the blind leading the blind sometimes). If I was to claim carers allowance for spending more than 35 hours a week looking after her is it likely to be frowned upon by the PIP people? Might they argue that as I receive the higher rate of PIP myself I should be incapable of being her carer? I am reticent about rocking the boat where my PIP award is concerned but the reality is I DO spend more than 35 hours a week as her carer. Any thoughts and/or advice would be gratefully received. Thank you. Graham