Dear Welcome to HCM We understand your concerns I went through your details. You started body building training and that is the correct answer to your question. Also you cannot rule out anxiety. Body needs energy to do its day to day functions. You started body building and the energy is being spent on that front and therefore your body struggles to adjust energy for other activities such as sex or masturbation. Almost every body builder faces this problem. Your supplement has nothing to do with this. Your penis has not become smaller. The training schedule made you anxious about your sexual performance and now you feel all these. Means all these problems are just in your mind. Forget it. But body building and sex go hand in hand only if you have enough energy. Distribute your energy wisely. Hope this answers your query. Available for further sexology clarifications. Good luck.