Hi Thank you for asking HCM I have gone through your query.You should get rid off anxiety including performance anxiety and stress as those can be main offenders.You can do squeeze and stop technique.You can deviate your thought to something nonsexual when you about to near ejaculation.You can put on a condom or condom with anesthetic which will decrease the excessive stimulation on penis and there by prevent premature ejaculation.If all these not helping then you can approach a sex therapist or psychiatrist for behavioral therapy and medicinal management like antidepressants.SSRIs like paroxetine or Dapoxetine is the usually prescribed drugs for this.But if you not getting normal erections then phosphodiesterase inhibitors like sildenafil may help.Hope this may help you. Let me know if you have any further query.