A new report says almost a third of diabetic hospital patients are victims of medication errors.
The National Diabetes Inpatient Audit was led by the head of Ipswich Hospital's Diabetes Centre. It found hospitals in England and Wales made at least one mistake per inpatient - potentially causing dangerous blood glucose levels.
Sarah Crowther, who lives in Cambridge was left looking after her own insulin levels while she was giving birth.
She said: "I was told i'd be on an insulin sliding scale - and given a constant level of insulin to keep my levels controlled.
"For whatever reason that didn't actually happen so I ended up adjusting my own insulin while i was in labour so every hour and if it rose to high I'd give myself insulin to bring that dow. I should have been on an insulin drip."