So, My friend and I were using essential mod and a ton of other mods I put together for a mod pack. He hit me and both of our screens started shaking violently and no mobs would attack us to kill us, but we had 0 hearts, couldn't pick up items, couldn't do anything in creative, and couldn't access our inventories. I have tried deleting my playerdata in the playerdata folder, but it never actually deletes my inventory and I still have all of my stuff. How do I delete my friend and I's playerdata because that's what I have been told that could fix this. If it doesn't fix this issue, what can solve this problem? I've worked on this world for 3 months and this small problem will make me lose everything.