BD fail

So since I still haven't ovulated and I am getting signs it should happen soon I decided to try with dh today since our last time was 3 days ago - it may be fine if I was a teenager who didn't want to get pregnant, but as a 30 something year old woman with husband that has severe mfi it is impossible. So I tried to get dh before he went to work this afternoon. Everything was going fine until it was the moment to perform and then dh went limp. So not only did we not get a shot to bd for our last natural cycle, but now we are both in a bad mood and upset.