Just nervous

So last night my boyfriend and I were getting frisky.. Which obviously is all good and stuff. But while I was on top of him (just kissing and stuff) he started pushing my shoulders and hips down. I know that was his hint to do oral... I've never done that before even though we are sexually active. So I have a lot of anxiety about it.. Like am I gonna be bad at it, or what if I do it wrong ? And I started like freaking out and shaking because I was so nervous. I didn't end up doing it because he noticed and said it was okay. But I just feel horrible because he does oral for me. And we've been sexually active for a long time. He's never actually acted on wanting oral so i didn't think it bothered him. I thought I was ready but in the actual moment I freaked out. I don't know what to do.