Is it me?

I've been married for 8 months and my husband and I used to make love every day. For this past week his penis can't stay up. I have tried everything on this past week. He teases me but we can't do anything because it can't get up. I just keep thinking that I am doing something or that he is not interested sexually. I have talked to him and he says that it's him and yet I try and he doesn't want to go to the doctor. I dont want no more weeks passing...

Any ideas or recommendations?