Partner smells poo when giving me oral help !

I noticed my partner had been hesitant in eating my vagina out recently and so I asked him tonight why and he said that a few times when he’s been down on me recently he’s smelt poo and the most recent time it was bad so it has put him off he tried to be sweet about it but in all honesty I’m horrified and embarrassed I even turned over to cry. I shower regularly end everything but I also have a IBD disease which could be partially why as it causes me to poo regularly. I don’t think I’ll ever be comfortable for him to touch me again. Help