Question / Help OBS Studio: Lags my PC when open.

[Shype]

For months, I've streamed with OBS with no problem, and 2 days ago, I started streaming on twitch, and got a bunch of things going with Streamlabs, such as chat, viewer count, and more, put in with the browser source thing.
It wasn't until yesterday that opening OBS lags my entire PC. It's never had that problem before. The ONLY differences I've made yesterday that wasn't there before, is I added 2 images, one for my face cam frame, and another for a general overlay. That's it.
Now my entire PC is slow as can be when OBS is open, and I'm not sure it's a virus, as it's only when OBS is open.
No clue what to do. I'm going to try a few things, such as re-installation, removing some Streamlabs browser source things, and more, but I assure you, I had those before and it never lagged then.

Edit 1: Removing some browser sources did nothing.

Edit 2: Reinstalling did nothing.

Edit 3: For some reason, hiding the facecam frame and overlay reduce lag by a lot. I may be onto something.

 

[Shype]

I think it might have just been the 2 images (what?!)
The lag's 90% gone now that I removed them, obviously having the program open lags my PC a tiny bit by itself, but I'd rather have a tiny bit of lag rather than a tidal wave of it.