Oral sex issues tmi

Okay my hubby and I were going to get it on last night and when I got all nice and sexy in my lingerie he ended up falling aslee he has had a long work week so it had been 8 days. So I was really, really frustrated and mad. I went to sleep cranky and was like yup Ima be a total bitch alllll day tomorrow lol. Well first thing he wakes me straight up with morning sex, which is my favorite!!! Well he finished so quickly because I was a tad tighter than normal due to inactivity lol. But he was like I'll take care of this and went down on me... He was really getting into it and doing all the things I love and I just couldn't cum. He was like what is wrong and I was like I don't know dear. He kept going he was so determined (I like being bitten down there) he started nibbling on my clit and sucking and just burning his face in it I finally came but I literally had to focus on that being my main goal for it to happen.. Anyone else have this issue or know why it could have happened. I hope it's just a one time thing because I looooovve when he is down there. Lol