I always find that preparation always lessens my fears. You need to take the time and write down exactly what your fear is. Once you have a true understanding then figure out a plan to minimize the impact and ultimately execute the plan. You might have to go thru the process a number of times but you will get some relief from your fear. It helps. Do it. Don't just think about it. Often the fear you don't know is much scarier than the one you understand.