It's Friday, you've pushed yourself all week, so naturally, you've neglected to take care of your basic needs. Especially today. After all, it's Friday, it's almost the weekend, you can push yourself for a few hours more and then take care of yourself, right?
It doesn't matter that it's Friday. If your energy is running out, take a break, eat, take a shower, and then continue. Work is important, yes, but you can't work if you feel icky and malnourished.
Have a nice weekend!