Penis is curved to the left when it's half erected but after fully erected it's almost straight. any problem in future with peyronie's disease?

Penis curve: You need to see your doctor for a definitive answer. He/she can examine you for plaque in your penis. What you mention may be normal but seeing your doc can put your mind at ease. Peace and good health.

NO: not unless the curvature becomes permanent, especially with erection. Additionally, in Peyronie's disease, there would be hardening of thickening of the penile tissues.