Receiving oral

I love giving my husband oral and I'm pretty good at it if I say so myself.

Tonight he was about to go down on me for the first time and I totally freaked. I scurried away I got so nervous and embarrassed.

I'm so self conscious of how I'd smell, taste, etc and while I love to give pleasure I have a really hard time allowing myself to receive it. I just now got comfortable with allowing him to finish me manually after sex.

My body wants oral but my brain is overthinking it.

How can I move past this?