UE4 running extremely slow, mostly unresponsive

I’m using 4.17.2 and I just tried to open a project. It loaded up pretty quickly but then it just went reeaaallly slow all of a sudden. Once it loads up it says ‘finished asset discovery’ and all textures are kinda blurry. I can click twice on the scene properly before it basically freezes/going extremely slow.
I tried closing any other programs to see if those affected it, and also tried restarting.

Also, just to make sure it wasn’t just my project I tried to create a new one. Once it got to the load project/create new screen the same thing happened - everything was slow, hovering over anything clickable just showed a black bar.

The asset discovery said I had around 2,000 assets which is definitely way higher than what I actually have.

I’ve got:
i5-4690k
R9 390
8GB RAM

It’s worked fine before, but the last time I tried was november/december time.

It’s still loading, the blurry textures are because it hasn’t loaded in the full textures yet

When I’m at my PC next I’ll load it and leave it and see if that’s the case.

But how come trying to start a new project causes similar issues? Surely there’s not much to load considering a project hasn’t even been opened yet

Edit: So I let my project load for almost 20 minutes but the issue still persists. I don’t think it has to with loading.