Your age is the factor, Income support is only �47.95 for under 25's so you already have more income than that figure coming in via your carers allowance
Whether you are eligible for Council Tax and/or Housing Benefit depends on who you live with and whether you are the person liable for the council tax/rent ,if you are then the Local Authority should be aware of your situation so that you are paying the correct amount
the person you are caring for. who are they as you have not mentioned who they are and that makes some difference
To be eligible for Carers allowance the person who needs care should be in receipt of either Attendance Allowance or DLA which they would have to be otherwise no Carers Allowance would be payable and also caring for more than 35 hours
The amount you get does seem a pittance for the things you may be doing, but it's far more then just the standard �47.95 JSA for under 25's