flockwallpaper thank you for that thoughtful comment. Not that I need to justify myself to you, but:
DH worked full-time, I was a part-time RN. We had 2 children who were 2.7 and 12 mo. I fell pregnant with DD3 (very much wanted and planned, incidently). All was good. DD1 was a handful, but they all grow up, don't they?
At 9 weeks pregnant, preschool raised concern about DD1's development (previous concerns were written off by the HV team, and I was reassured that she was fine). Three weeks later she started to fall over for no reason.
To cut a long and emotionally draining story very short, DD1 was diagnosed with a brain malformation. She is not going to grow up in the same way as most children. The constant supervision she needed at 2.9 is still needed, in fact more so, at 4.6.
DH had to cut his hours to a 4 day week, and I had to stop work. I spend a lot of my time sorting out the provision for DD1 and liaising with health professionals, education etc.
So, we went from an income of over 25K to DH's income of 14.5K plus Carer's Allowance for me, as DD1 gets High Rate Care component of DLA.
I hope that illustrates how a family can go from getting minimal tax credits to relying on them as a major source of income.