Don’t worry you didn’t offend, it’s just PMS 😛
My advice remains the same though, stop guessing, and just talk to her. You clearly loved this woman enough to decide to spend the rest of your life with her. Sex should be something you can talk about, even if she’s conservative.
Do it from a ‘how are we doing?’ checkup kind of thing, just include sex as part of other things you talk about. Don’t make it some big taboo, it’s not, the world has changed, it’s okay to talk about these things now. Ideally try to gauge where she’s coming from before you tell her about yourself but keep the conversation light and be aware it’ll be out of the blue for her so you might get a knee jerk reaction at first. But both of you deserve to know what the other is thinking. It’s not like you can end up having LESS sex, is it.
I hope that helps you,