Feeling guilty — did I mess up?

Pe

Had a baby at 36, going to have another one at almost 38. I never thought I wanted kids, but now, I love them so much, and I feel like I’ve lost time. Why did I wait so long? I think we might want a third, and I have this reoccurring thought that I’m going to be too old to care for them later in life. How am I going to be energetic? What if I die before I get to see my grandkids? When I think of the “career” I focused on instead of focusing on my family, and I think of all the stupid outings and restaurants and other stuff I look back on that seems so frivolous... I just feel dumb. Anyone else?