I don't know if this would work for you but I bought 1 dozen hot Krispy Kreme donuts one day before I actually quit so I wouldn't use for the day. I was planning to quit support free, needed something to get me started. Worked till all the donuts were gone. I didn't keep trying that though. I agree with taking time off from work. I would really take 2 or 3 days off if you need to especially if you have vacation time. Once you're through the first 5 to 7 days you should be back to at least being able to fake your way through work. Good luck DONT GIVE UP like I did not matter what, this might be your only chance.
Matt