I’ve only had sex with one guy and he hasn’t had this particular issue (yet), but we did have a situation once that might be similar.
I’m not a huge fan of receiving oral sex. I don’t have anything against it; it just makes me feel self-conscious and uncomfortable, so we haven’t tried in a really long time. Plus, I have some ongoing gynecological issues so that in itself makes me feel icky. Well, before all that, after we first started having sex, I let him do it. He had just gotten back from working out of town and was really tired. We started fooling around, he was hard, and it was all good. He went down on me for a few minutes and when I pulled him up, I reached down and all I found was a soft penis. Wow, take about an ego blow. I was humiliated. He automatically started telling me it was because he was so tired, paired with him focusing on me so hard that he was distracted from his own erection. Well, I automatically thought I had a funny taste or smell, that he was grossed out by it, etc. Even though he assured me that was not true, I was horrified and nothing sexual happened that night because of it.
Shit happens. I’m sure the situation embarrassed him as well (he doesn’t like to discuss it), but you get over it and move on. Maybe you were tired or nervous or drunk. Maybe not. Just forget about it.