Erectile Disfunction

My husband and I have been together for 10 years. He's never had a problem getting or keeping it up. We started trying about 2 months ago, and ever since he's been having issues. I have a feeling he's feeling the pressure to perform because he knows how much I want to get pregnant. I've tried quite a few different things and try to make sure to make sure he knows I'm not upset, but I know he feels bad and like he's disappointing me. I'm at a loss. Has experienced this? Any advice?