You're very, very, very close. Close enough to have 'accidentally' stumbled on it the day you referenced, where her stomach and muscles both hurt. Spoiler for the difference after the break.
You're hitting two out of three criteria for the Curvy / Fit And Fat / Middle Of The Road route - sugar/carb heavy meals and working out - but missing the third element - sufficient protein. Add some eggs / hamburgers / chicken to your diet and you'll be good to go.