If my serum creatinine increased but within normal range is it certain i will develope ckd?im so worried to have ckd.

Stop worrying: Jeff, someone has perhaps misled you. Everyone will at some time in his/her life will have creatinine increase -- it always happens at puberty, especially in males, and it happens to any young man who starts a fitness program. These are not thoughts that you should be having -- life's hard enough without this. Please talk frankly with a competent, caring physician.