Hi Am 25 Yrs Old. I Can't Get Good Sexual

Hi am 25 yrs old. I can't get good sexual life because of premature ejaculation and impotence . Since my age of 14 I do hand practice.. from then I I feel that my pennies is always soft never I had seen it in very strong now after marriage i am facing that my pennies erects semen when I do only foreplay and after that it becomes very small not become strong again...