Driving test worries uk?

i have my practical driving test next week and i am really panicing. i keep messin up and doin really stupid mistake (mainly in my mock tests) today i did a mock test and did excellent except for 2 things, bumping into a curb on a reverse round corner and pulling out onto a main road i falled to take a second look left and nearly crashed into a jag. both of these are serious faults and i would have failed. thing is when i am just practising i am fine i make no mistakes, and even on my mock tests i do everything great except 1 or 2 serious faults. my main problem has been reverse round a corner on my mocks i can do it perfect when practising but fail to do it properly in my mock. i am now panicing for my real test i know i can do these things fine normally but struggle in my mocks i worried ill do them in my real test any advice from n e 1 wud be great. p.s. im female 24 and have been having 2 hour lessons a week since first week in january plus 2 10hr block and my husband helpin me