Game keeps freezing...but also it doesn't? (it's not mods)

My game keeps freezing on the main page before I can even start playing one of my saves. It even loads up much slower than before and sometimes will seem to freeze on the game loading screen. When I minimize the game and reopen it, it will do things while the game is minimized (idk if this makes sense, but I can use my laptop's touchscreen to click something even though the game is frozen, and when I minimize and reopen the game it will be like if I had clicked it normally). I know it's not a mod problem because I've been able to shut the mods off and the game still freezes. I was also worried it was because my computer is running out of storage space, so I bought an SD card and downloaded the game on there instead of on my laptop, and it still freezes. Has this happened to anyone else before? This has been going on for a little more than a month now, and I'm getting extremely frustrated. Thanks to anyone for their help!