Have you seen a pro at all ?
I'm not one who normally recommends lessons but maybe it's worth seeing one
Also maybe video your swing and upload it and there will be a number of people on here who could give you some pointers ?
If the OP is struggling I'd agree with LP. Maybe speak to him about trying to clear your head as you walk onto the first hole and find a way to relax and take the range form to the course. If he has the solution, give it to me!!!!!!!!!!!!!!!!!!!!!!!