My first sick note has run out, and my usual doc is on holiday, but she told me to just ring up whenever I need a new one as she knows my situation and has recorded the severity of my depression on the screen. However tonight a doc I occasionally see rang me and told me she'll only issue me with a sick note for 2 weeks then I have to go back and see her, as my doc is on hols still then

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In the meantime I am caring for my Mum and get carers allowance and income support, and have today received a letter saving i'm also entitled to IB.If sick notes aren't issued, even though I am in no way fit for work, can I be forced to work, or does being a carer exclude me from this?
PS I am also confused where the IS/IB and CA all fits in, I know i'm not entitled to them all, and can't get a straight answer out of anyone at DWP
