Ways to tighten up down there?

My husband is on the smaller side and I was always concerned that if I had a vaginal delivery that it would affect our sex life. I did kegels before labor and for a couple of months after and that helped some. I thought I felt normal to him until today (20 months postpartum) he confessed to me that I’m not tight like I used to be and that in combination with me getting wet and his size makes it hard for him to feel anything and enjoy sex. I’m currently pregnant with our second and I’m stressing over giving birth again out of fear of stretching out even more. Any tips on what I can do to try to fix this?