u said 3-4 month . Do you practise everyday ?? Not like play 1 day then rest 1 week . Like this for sure 3-4month also not enuff for u man . Practise at least 5min a day . Every guitarist went through this , i passed this period in 2 weeks. I agree what nerd says , if u play classical , u have to stretch yr finger alot. Practise make thing perfect , even my mom this year is 58 liao , she can passed this suffering period in 3 weeks.