I masturbated several times a week using my own skill, but i have problems cumming after having sex with my wife, is that anything i could do?

Masturbate less: Some men have trouble ejaculating with their partner because they masturbate too much or their masturbatory style is in sharp contrast with the type of stimulation they receive from their partner. For example, intense stimulation with masturbation that cannot be duplicated by sex with the partner. Other reasons include fear of pregnancy, fear of intimacy or anger. Try masturbating less.

Communication: Open, honest communication with your wife about your sex life would be a good start-- i.e., what arouses you, what is a turn-on or turn-off, what sorts of things you would most enjoy doing in bed, etc. (and vice-versa-- what would make sex most exciting and satisfying for her). If you are short on ideas, read a guide to sex book together (like "joy of sex") to help get a conversation going.