Has anyone successfully overcome the mountain that is brushing your teeth when you have bad pregnancy sickness (week 18 and still struggling)... I have tried a different toothpaste, not going to the back of my mouth, smiling to trick the gag reflex, standing on one foot(!) etc...where I'm being sick and/or retching quite a lot I'm worried about not being able to brush my teeth as much and the effect of the acid. :(