From what I understand, this is a very, very common problem. You buy a nice camera, start using it regularly, realize “Hey, I’m really loving this new photography hobby!” and then immediately start looking at more gear. I’ve definitely fallen prey to that urge. It doesn’t help that B&H (where I’ve purchased most of my stuff) is very good at sending newsletters and announcements about new gear and retargeting me with ads for camera gear on every site I visit.
Anyway, I’ve (mostly) resisted the urge. This article does a great, quick job of discussing what to buy in the first place and when to upgrade.