I have spent countless hours staring at videos and practicing on the courts the dreaded 2nd serve. I've gotten to a point where i can get my kick serve in 9/10 times in practice. However come game time its always back to the 30 mph slice serve which is killing me as i face harder opponents, if my 1st serve's not on I LOSE. Like today, in front of my future high school coach i COULD NOT GET A SINGLE SERVE IN, and so i lost 6-3 to someone i could usually beat. The only game i won on my serve i got my first in the first 3 times, and won the points because of my 2nd serve barely escaped in deuce. I've tried the kick serve during matches but the "pressure" of hitting a 2nd serve and possibly double faulting gets to me and i end up either swing to slow or rushing which results in a double fault, so its back to the slice again.
Has anyone else experienced this, and if so how did u fix it?

Has anyone else experienced this, and if so how did u fix it?