2nd IUI and technical difficulties

We have been TTC #1 for 11 months, we are both 32 and in good health. Hubby's semen analysis is good. I had a polyp removal surgery in January. We did our first IUI, last month, and it was unsuccessful. I had my second IUI yesterday afternoon. Everything with the procedure went well, however last night when we were supposed to BD, hubby had "issues". This has never happened before. I was so disappointed and really devastated. I'm not sure if TTC is just taking its toll on him. I'm afraid to try and BD the next couple of days bc now hubby is worried and nervous that it will happen again. Not sure what to do and I feel like we just wasted this IUI and cycle.