1) Talk to Missy, you told her you would inform her before taking a pill. So you have to talk to her to trigger the event (repeatable).Two questions:
1) How do I use the Missy's drug? There's no use button in the inventory and I don't get prompted to use them before sleeping
2) Why is the gallery greyed out in the phone?
2) They added a bunch of buttons to the phone early on, then never did anything with them. The "Candy Basket" in the main menu is for gallery/replays instead.
** Note: if you have ever had a scene in any save, it will be in your candy basket and stay for replay, even if you delete that save (only "Settings: Delete all Save files" checkbox will remove them)