Courses for the fall

I'm a sophomore right now and I'm pre dental. Right now I'm taking only Bio 106( Ecology Evolution) Chem 2(W/lab) and a psych adolescence course. Is this a light schedule? Should I have taken another class? The reason why I'm asking this is because apparentlyy dental schools look at the amount of courses you have taken per semester. Is this true? Also I heard that dental schools like NYU columbia and stony brook look at how hard your courses were per each semester. Is this true?

Courses for the fall