Hello, Welcome to HCM, If you re a healthy adult male, without any chronic disorders such as ( Systemic Hypertension / Diabetes ) nothing to worry but most males, they suffer from this anxiety, and it comes in everyone s life, where they feel they are not able to satisfy their spouse/ loved ones. This leads to an anxiety and negative thoughts start creeping into their sexual life. There is no such approved treatment to increase sexual stamina. You need to be strong psychologically and moreover you have a daughter. I will advise try taking like a couple of days off from your work. Spend some quality time with your wife. Thank you.