Bf dizzy during blowjob

So today I was giving my boyfriend a blowjob and towards the end when he was about to cum he told me that he was dizzy and I asked him if he wanted me to stop and he said yes. And I started getting worried because this never happened before. He laid down for a couple minutes after and I kept asking him if he was okay and he said yes. He said he thinks he got dizzy because it felt really good. I’m just not sure if that’s the actual reason or if this is something to be medically concerned about? Please help, I’m still worried about this.