Oral help 😏

I'm 22 and have never liked anyone performing oral on me, I'm happy to do it to others. I've always kept clean but I get nevous about the smell etc, I've tried a couple of times with my ex partner of 4years straight out of the shower however I can't relax & end up telling them to stop after about 30seconds to a minute. Now I'm thinking of getting with someone new but I don't feel normal, is it a normal thing to not like it?