Dear Welcome to HCM We understand your concerns I went through your details. I think you are young and you do not have sexual experience. Penis size is not detrimental of your healthy sexual life. Even a two inch erect penis will be able to satisfy any woman across the world. Testicles will be usually shrunk when it is not active and will be flaccid whenever you are relaxed or stressed. This issue is normal and happens with everyone. These issues cannot hamper your sexual performance of the future. The lack of knowledge about sex and sexual organs could be your problem. The lack of knowledge triggers anxiety whenever you think or obsess about those. Such an obsession could trigger feeling of pain, where as the pain never exists. That is called, in psychology, psycho-somatic disorder. I suggest you to consult a psychiatrist / psychologist for treatment. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck. Take care.