Hi JAF
We cannot give you an answer as it depends on the makeup of Pension Credit and what you mean by getting a carer.
If you are in receipt of a qualifying benefit and receive a SDP which enables you to claim Pension Credit then you may loosed Pension Credit if someone claims Carer Allowance for caring for you as you would loose your SDP.
If you get a carer who does not claim CA for caring for you then everything would stay as it is.
You need to seek advice from a welfare rights adviser who will be able to take all your circumstances into consideration.You can find your local Welfare Rights Worker to help you with benefit entitlements by clicking on the link below and putting in your post code, it will then come up with a MAP with a list of agencies.
advicelocal.uk Gary