Struggling with My Role as a Daddy

I've been playing the role of Daddy for my partner, Mia, for about six months now. It's been incredible seeing her grow and mature under my guidance, but lately I've found myself feeling overwhelmed by the responsibility and pressure to always be strong and in control. Tonight we had an intense session where I pushed too hard, causing her to break down emotionally. Seeing her hurt this way made me question if I'm truly cut out for this dynamic. Is it normal for the Daddy to feel so much doubt and vulnerability? How do you balance being tough when needed but also allowing yourself to be vulnerable and supportive?