I FAILED MY DRIVING TEST TODAY

I failed my driving test today. I made an improper lane change while there was another car closing in on the other lane. I could've easily made the change but I guess I was somewhat afraid to pick up speed for the instructor might deduct some points. He then abruptly ended the session and gave me a lecture about the major mistake I have made. I would say I made a huge mistake but the instructor really could've cut me some slack by giving me a second chance. I blame once again my lack of confidence and being "out of state". Being in a confident mood seems to be getting more and more difficult for me lately. I have no idea what's going on with me recently. I need to be in a confident state more than ever now that I'm moving in to cashlane and I need to set the tone early and make a good impression in front of my new co workers.