Boyfriend shaking before sex?

So my boyfriend and I both lost our virginities to one another last weekend. He's super inexperienced (I was his first everything). Right before he put it in, he was shaking like crazy and continued for a minute or two. He also did this when we had our first kiss. I get that it's probably nerves, but I feel so bad!! I know he feels comfortable around me so I don't know why he'd be doing that 😪 he doesn't have anxiety or anything. has this happened to anyone else?