Whenever I try to start Forge (with and without mods) in 1.12.2 or Optifine in 1.14.4 since about 2-4 days ago, Minecraft just doesn't load. The launcher works fine, and says that the game is loaded and running, but it isn't. I've looked in the task manager, and there's no mention of anything relating to Java, Minecraft, or Mojang. Vanilla 1.14.4 works more or less fine, so it must have to do with externals. I downloaded both Optifine and Forge recently, as well as Discord, so I'm not completely sure what is causing it. Has anyone else come across this issue? Are there any solutions that don't involve reinstalling the game?
Edit: It wasn't Optifine. I deleted the file from versions and it still didn't load. I also don't think it was Forge or Discord, as I got Forge yesterday and I started having issues a few days ago, and I seriously doubt it was Discord.
[21:19:52] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[21:19:52] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[21:19:52] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[21:19:52] [main/INFO] [FML]: Forge Mod Loader version 126.96.36.19938 for Minecraft 1.12.2 loading
[21:19:52] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_51, running on Windows 10:amd64:10.0, installed at C:\Program Files (x86)\Minecraft\runtime\jre-x64
[21:19:52] [main/INFO] [FML]: Searching C:\Users\Beth\AppData\Roaming\.minecraft\mods for mods
[21:19:52] [main/WARN] [FML]: Found FMLCorePluginContainsFMLMod marker in Quark-r1.6-174.jar. This is not recommended, @Mods should be in a separate jar from the coremod.
[21:19:52] [main/WARN] [FML]: The coremod Quark Plugin (vazkii.quark.base.asm.LoadingPlugin) is not signed!
Say something silly, Laugh 'til it hurts, Take a risk, Sing out loud, Rock the boat, Shake things up, Flirt with disaster, Buy something frivolous, Color outside the lines, Cause a scene, Order dessert, Make waves, Get carried away, Have a great day!