Oh dear, I know that feeling too and it's difficult to get rid off. Personally I think a quick nap will sort the problem. Your body is telling you something. I think prioritising a quick sleep and not fighting what your body is telling you will be best if you want to last the day. Plus, you've had so much stress lately, I think it's taken it's toll. Any chance you can take a day off hun to recharge your batteries and take care of you?