I can’t craft in MineCRAFT Java

Out of nowhere since one day in pvp legacy suddenly i couldn’t grab items in my inventory. I figured that I actually had to drag them to move them and the sprite was very laggy and far away from the mouse pointer. When crafting multiple items like sticks i couldn’t shift click and I had to drag them over and over again and it grabbed 3 items at a time instead of one it was so weird. In servers like pvp legacy where you choose game modes through inventory I had to drag the item outside the inventory for the option to work and couldn’t click it normally. I haven’t found anything like this in the internet so if any of you know what it is please help me. Crafting has been a nightmare for me without shift click and a glitchy crafting overall. Also my username is idkmyname934. MineCRAFT is kind of hard without the crafting part I might as well say that I’m playing MINE 

try restarting minecraft

Wow, I've never heard of a problem like this.

probably a bug, restart the computer lol

Maybe try resetting your settings all the way to default.