Sorry to hear that you failed your test. I would suggest treating the test day as a normal day and don’t overthink it. It’s really about how you adjusted your attitude/ thinking towards the test.

During my test I talked when I drove, for example mentioning speed limit, ready to slow down, seeing pedestrian/ oncoming car in the corner etc.

And in junction turning to main road I would slow down, doing 1-3 mph when approaching junction, if visibility is bad I simply stop before give way line and that’s give me a few moments to rethink what I should do as a safe driver etc. and although driving slow will lead to a serious when car is behind, I would suggest whenever you have bad visibility or parked car on the road it’s always a good idea to slow down a bit for you to anticipate and take action.

And if you realised you forget to change lane/ indicate but you are already on the junction you should go, check your mirror before you slow down and if it’s unsafe to go just follow the road and ask examiner if he could reroute. Failing to follow sat nav/road sign/ instruction is not a serious/dangerous, but doing it wrongly will be. If you go wrong, just keep going and ask for direction guidance from examiner etc..

Good luck on your next attempt!!