Erection and Premature Ejaculation. Me?

Hi Doc, I'm 29yr old.. I've been masturbating from the past 14 years. The problem is that I've never realized that I got addicted to it. On an average I masturbate for 3 times, at times it goes beyond 10 times a day :( I recently read an article about how over masturbation is very dangerous. Couple of days back I had sex with a girl and observed weak erection. And most of the times when i masturbate my penis won't be fully erected. Now I'm worried because after getting married if the same situation continues then I'll be in trouble. Heard that ayurvedic herbs like Ashwagandha, Shilajit and Gokshura helps to combat this issue. So I've bought the capsules and want to ask a Doc before consuming them. Kindly advise me how can i overcome this issue and are those capsules of any use to me? If so pls let me know how to take them...