Pregnancy and missing childhood

So I'm having my baby a bit young but I've been feeling a bit sad lately like I'm growing up so bad. I know I'll probably get negative comments on this saying I'm immature but I feel like life has gone by so fast and I miss when life was simple.I've been super close to my mom lately like I'm afraid to loose her because time seems to go by so fast. I know it seems to be stupid but that's how I feel. I love my family and wish I could be with them forever and I'll be sad to watch my baby grow up.