I can only give my wife 2 or 3. I'd love to able to give her more.
I love giving oral and it's probably the best way to get multiple orgasms. The tongue is simply the best thing to use for caressing a vulvas lips, clitoris, and vaginal opening.
It's not just normal, it's wonderful.
Multiple orgasms are a wonderful thing, and not every woman can have them.
You actually don't say, in your post, whether you're having multiple orgasms. It could be that you are and you're wondering if that is normal, or it could be that you aren't but you or your bf thinks you should be having them. So I'll just say, it's totally normal for a woman to have multiple orgasms, but it's also totally normal for her not to be able to, or to need a break after an orgasm. So just talk about what you enjoy and let your bf know if you need a break after oral sex.