Please prescribe me right homeopathic medicine?

I am Md.Omar Siddiqui. I am 38 years old. In 2004 I got married. Since my marriage I did not satisfy my wife with my physical love. When I with my wife, I can last only 1 or 2 minutes. My wife feel dissatisfied. In a week I can only one time with my wife due to my weakness. I have another problem that is I have weak digestion. Day by day I am being weak & sick. One of my friends advices me to take homeopathic medicine -acid phos & lychopodium. But he did not advice me when and how I will take these medicine. Please advice these two medicine is okay or advice any better medicine.