I know how you feel calia25, 4 years ago I was moving house and had my mail sent to my sisters because my new house wasn't ready. My sister phoned to tell me my new insurance documents where at hers.
I took that for granted and was pulled 2 days later for not having insurance, I checked and found out that because of a change of address and bank details it wasn't paid. My mistake and I was insured again 30 mins after I was pulled.
I have never knowingly driven without Insurance, but my error cost me a £250 fine and 6 points. The magistrate must of had a bad day, because when I tried to explain the circumstances, she threatened me with a complete ban.