When did you start buying things and putting the nursery together?

Hello! I’m currently 13 weeks and just wondering when others started buying things and putting the nursery together?

My first pregnancy ended in an MMC and I also know a few people who have struggled with reoccurring still births. I’m just hyper aware that although I’m 13 weeks, this pregnancy isn’t a given.

Part of me wants to wait until my 20 week scan to start doing anything “baby related” around the house, but idk if that’s waiting a bit too long.