I know what you mean. I have to get up at 7am to get DS ready for school, and i struggle. Im trying to go to bed around 8.30-9pm. DP has been making the dinner so from 7pm onwards i lay on the lounge and rest, try and delegate the jobs so you can have a break. I so now what you mean though, i have really noticed it being a hairdresser and being on my feet i also try around lunch time to not eat on the go but to sit down for an hour and rest to get my second wind....then i have to do the school run again. just take it easy and donrt worry about yawning...you have an excuse. take care