Hormones can be found

after Fem 301 you'll get them each time you go to class

Missy's job: Running errands

Missy's job: Clean the bathroom

After Sissy School class is over take the elevator to the white room in the sissy school

Talk to Spanky at the diner (after the school is over I think) and he'll sell you some

Or Talk to Spanky in the Pink room working as a waitress and he'll sell you some