Hi, I have read your description and understand your concern. The problem you are having with erection is mainly due to associated psychological factors than physical one. You seem to be getting panic attacks because of your under-performance during sexual activity. You can overcome this problem by doing the following. 1. Kindly practice pause and squeeze technique, which over a period of time helps you to sustain erection for a longer duration. 2. You need to overcome fear or anxiety by doing meditation regularly to keep your mind calm. 3. Include in your diet - almonds, banana, pineapple, saffron, cardamom, figs, honey and pumpkin. 4. In case you have increased sensation of the penis, use of topical anaesthetic creams and sprays that contain a numbing agents, such as lidocaine or prilocaine will help. 5. Intake of selective serotonin re-uptake inhibitors (SSRIs) such as sertraline would delay ejaculation. Once you regain your confidence, you should be able to gain good erection gradually and perform better. Later, you may decrease taking medications or take only when it is absolutely necessary. Hope the information provided would be helpful. All the best.