My dad went and helped me fix it! Turns out, when I updated my driver (around the same time I downloaded the new patch), my gaming graphics card was deactivated. I was trying to run the game on my integrated graphics card, which was NOT designed for gaming, which is why my RAM kept running out while I was playing.
So I’m going to install the patches and re-install all my packs! And then, my custom content and the Derpingtons!
In other news, my sister is trying to catch a fly in her hand. My family is awesome.