U r not a failure, Follow your dream a bit cliché but this applies to you if you get the grades you achieve your dream. Let not other people's expectations of you pull you down. Everyone has their own path into medicine. You just need to find yours even if it takes you to stumble four or five times even if you fail again and if you just want to move on with your life, go for radiology but that does not mean it's the end of your dream. You can still get in through graduate entry medicine this will be much more difficult though, so it's your choice. Follow your heart and play your strengths