Conflicted Moments During Our First Time Together

I’ve been engaged to Sarah for six months now, and we’re planning our wedding. We both know each other inside and out, or at least, I thought so. Last weekend, we decided it was time to take things further sexually. But what happened that night made me question everything. Sarah’s a beautiful woman with long, wavy hair and deep brown eyes. She came over early in the evening, excited but nervous too. We sat on her couch, holding hands and talking about our feelings until the tension between us became unbearable. I led her to my bedroom, where we slowly undressed each other. The first time felt awkward at first, she seemed unsure of herself, even though she’s always been confident in every other aspect of our relationship. But as I entered her for the first time, something changed. Her body tightened around me and I could feel that she was resisting it. It hurt a little for both of us, but we kept going. I began to move faster, trying to find some rhythm that would make this enjoyable for her. I reached down between us, finding her clit with my fingers and rubbing firmly against it. She gasped and then moaned softly as she started to relax, allowing herself to feel the pleasure building inside of her. Then came a moment that felt strange, an urge within me to push harder, deeper, as if I wanted more than just sex from this encounter. It was almost like wanting dominance over her in some twisted way. But seeing Sarah’s eyes well up with tears and hearing her soft sobs made me pause. We both pulled away from each other and lay there, panting heavily. Was it just because we were virgins? Is it normal for something so intimate to make you feel like this? I don’t want to hurt her or ourselves, but I also can’t deny the confusion inside of me about what’s happening. Any advice on how to proceed from here?