I secretly dislike my in-laws....I need to vent...

So my birthday is coming up and I always do a family dinner with my parents, husband and sibling. But this year since I’m recently married my husband and I though it was best to invite his parents and sibling as well. But now I regret it. They are so different than my parents, they’re very uptight and just bother me. They always have, but in the recent year I’d say they just get on my nerves. My husband isn’t super close with his parents and doesn’t tell them much so I always have to remember what he’s told them vs what he hasn’t. They’re very uptight vs what I’m used to: my parents and I are so close, we talk constantly, and I can say whatever I want, do what I want, etc. I don’t know why but my in-laws just give me anxiety whenever they come around. And I don’t want to ruin my birthday by feeling on edge all day w his parents around. Anyone else deal with this and how do you get through it? I love his parents, but it’s hard to get close with them, especially because I’m so close with my parents...and my husband knows that sometimes they annoy me, but I just don’t want to hurt his feelings by saying all of this because I don’t want him to feel offended