Rachel Morris' hopes of defending her Paralympic cycling title have suffered a blow after she suffered whiplash and shoulder injuries when she was involved in a collision with a car.
The 33-year-old is in a race against time to be on the start line for the time trial and road race at the London Games in August.
She was six minutes into a time trial near her home town of Guildford, Surrey, last week when the accident happened, British Cycling said.
Morris said: "This has totally screwed me up.
"I feel like everything I've worked for has been taken away.
"I can't imagine not being there, but I know how long it has taken me to recover from this type of injury before, and it was longer than I now have before the Games.''
Morris has a condition called reflex sympathetic dystrophy (RSD) which involves a malfunction of the nervous system that causes extreme pain and related sensory abnormalities.
When she injures herself, her body reacts in an abnormal way and destroys itself which has resulted in her having to have her legs amputated.
Recalling coming off her bike, she said: "The bike went up into the air. I remember looking across and I was aware that I was at the same height as the passengers in a car passing in the outside lane.''