Oral sex

I have always been super self conscious of the way I smell and that encompasses BO, breath, Vaginal smells etc. My boyfriend (he is a great person and super giving and loving in bed) has said that he likes to go down on me, and has done so quite vigorously, but recently he’s been hesitant to and I can’t tell if it’s because I smell or he lied or I don’t know... Nothing smells or looks wrong or off to me and I feel perfectly healthy but now I’m extremely self conscious and it’s affected my sex drive too. What do I do?