Ridiculously Low FPS

On windows 10, Vanilla Minecraft has suddenly started running really poorly for me. I did not change any settings or have any issues with the game prior to this and it happened out of the blue. I get about 4 FPS whereas I used to get 200+ on moderate settings. I have tried playing with the settings, uninstalling/reinstalling the game, updating my drivers, uninstalling/reinstalling my drivers, upgrading my RAM, disabling my onboard video in the BIOS, and reinstalling my entire OS. None of my efforts have solved this issue. MY specs are as follows,

AMD Phenom(tm) II X4 960T Processor, @ 3.6Ghz

16GB Ram

Radeon RX 550 

WD Blue SATA SSD 500GB

JVM Arguments,

-Xmx6G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M