Ttc and ed

My husband has a touch of erectile dis function, he takes cilias for it, but I'm not sure it's working like it should if he's not stimulated the whole time or if his mind get off track ( like I suggest a diff position or something) he losses it?? I've tried and tried getting him to open up and talk about it but he won't. He also I think is so worried about losing it that he goes so fast it's seriously like 1 min everytime?? We're  also tring to have a baby do you think ed hurts his sperm count? Is there anyone who has gone through this? How can I make sex a fun thing for us both?