I Just got married. We had 4 attempts. She has problem of dryness and thin vagina since it is her first time. In first attempt, I got ejaculation and satisfaction but my wife didn't feel it. We inserted for sure. In next attempts she got 3 times satisfaction/orgasm but I didn't even feel it. We used KY jelly for lubrication as she has dryness and I feel it dry while having penetration. Yesterday in our next attempt, I felt weakness in my penis. It couldn't hold erection as I was searching for condom and while wearing itself it lost erection. Also to note the fact, I am suffering from cold and fever. Should I take any viagra or something for curing this?