any running mamas?

My husband and I don't have children (yet). I started running three months ago and fell in love. I'm running my first marathon in San Francisco in July:) I've signed up for multiple racing building up to it of course. I'm loving all the training! My question is; are there any of you that avidly ran or run while pregnant? How long did you run before getting pregnant so that it's normal while you are? (I hope this makes sense) like, share your running story! I also gym and am very cautious of my diet. It's important to me to be healthy so I can someday keep active when we're blessed with a child and hopefully chase my kids around and keep up:) thank you so much!