Listen mate, don't get too worried.
I got caught doing 48mph in a 40mph zone the other day, I thought I was in the clear because I was on the 13th day of the NIR (the Police have to get the letter/ticket to you within 14 days for it to be valid), however, my luck, 14th day I was hit with the ticket.
I am 17, first speeding offense. I wrote to the Essex Police (from the ticket was issued) and explained my situation of how I had previously had an accident on my moped which was due to the other driver speeding and I am completely aware of the results of speeding etc. I also noted that I am aware of a 'Speed Awareness' course that can be taken. This course drops the 3 points - you still have to pay £60, but for the course.
I am awaiting the letter which will tell me when my course is.
So - Ask the police force who send you the letter about the speed awareness course, also - explain your situation to them; hopefully they'll let you take the course. Before I forget, you can only opt and take this course ONCE every two years, so if you get flashed again you're stuffed.