I am 28 years male. I am married for 5 years. I have a healthy and beautiful relationship with my wife. We do have sex but I could not able to penetrate ever since we are married. I tried different medical solutions but none of them worked. My testosterone levels were low but they went to normal ranges when I took some testosterone level boosting injections prescribed by my physician. But still could not penetrate. All we do is masturbate each other at the end. I know its a serious problem and I want to have a baby of our own. Whenever I tried to penetrate the erection starts to fell off. We also have role play, during which my erection is fine but when I starts to penetrate it starts to go down. Kindly help me or suggest me any treatment for my situation. Thank you.