Constant crashing all the sudden

Put the summary of the bug you're having here

What I expected to happen was...:
Play Minecraft as I have been for pretty much the last week or so with zero issues...

What actually happened was...:
Can play for anywhere from 10 sec to 1 or 2 min then it crashes

Steps to Reproduce:
1. Log in to server
2. Do Minecrafty things
3. Crash