Carers allowance stopped

My husband has had a letter saying my pip has stopped and he isn’t getting carers allowance any longer.
My pip has been paid today but less than normal.
I recently sent in a review form because I’ve now been diagnosed with coronary heart disease which is affecting my ability to do things. The side effects of the multiple medications I’m taking are also affecting my health.
I got a text when I sent the form saying I will still get pip while it is being reviewed but I think they may have stopped it. My form was late but I was waiting for tests and very poorly.