Dont know what to do/think

My son's sperm doner left when I was 7 weeks pregnant and the man he knows as daddy came into his life when he was 15 months old. So during my pregnancy and those first 15 months there are no special pictures of me and daddy loving a baby bump or in the hospital or anything. I only have one pic of me when I was 9 mos preg.

My question is when I get pregnant with my second child with my husband is it right for me to take pics of us with the bump and do all those sweet photo shoots during and after the baby is born when I have none of that with my son? I mean I was overjoyed to have him and never once did I think I don't want him or anything but I'm afraid if i do all all the keepsakes with the next one when they get older my son will feel like he isn't as important or his birth wasn't as joyful as his siblings.

I'm kinda in a catch 22 here. :(