Having a driving test at 3:50

So i took my first driving test this morning at 8:50 half way through went sooo well, my left reverse was very good, but then at the very last bit where the roundabout there were part time traffic lights that ive never seen ther before on lessons and i didnt see them because i was too busy looking to the right for cars on the roundabout and I sort of half way went through it, was so annoyed with myself, i got 3 minors but then them stupid traffic lights messed me up and that was a fail but anyway i booked it again for this friday and the only time was 3:50 what do you think it will be like, people said you will be just sitting in traffic most of the time, i feel confident enough when driving, i know how to do everything im just scared ill mess up again and i really cant afford to take another test