Nobile orchid- no idea what I'm doing

[Crazycatlady]

Hi, sorry for such a basic query! I have tried to google the answer to this but I'm struggling to find a resource that doesn't assume I'm a pro orchid grower!

I bought a nobile from ikea (of all places!) a few months ago, it's white with pink tinges on the flowers. I repotted it when I got home with some stones at the base and then multipurpose compost. It has done really well and then a week of so ago all the flowers dried up and dropped off and the leaves have started to yellow. I understand this is part of the lifecycle. There is also a new shoot at the bottom of one of the stems.

My question is what am I supposed to do with it now? Do I need to cut/trim anything, or re-pot? Will the old stems flower again next year? I have no idea where to start...

Thank you for any guidance!