You decide to run one more test. You take a blue pill, and a couple of minutes later you are in your own body. Taking another red pill, thankfully enough, changes you back into your girl form, and yet another blue makes you yourself again. "Hey sis, I'm going to the mall to meet some friends!" A lie, of course, but a believable one.
You hear your sister yell from the shower, "Fine, as long as you're back by 8. I'm going out then, and you need to be here to watch the brats."
Now that she's taken care of, you take your wallet, car, and pill bottles to the mall, and go in search of suitable clothes and accessories. You buy a purse first, as you need something to put the pill bottles in for now. A series of changes follows, as your credit card is under your real name, and you need to try on the clothes as a girl. Fortunately, you are there on a warm day, when most people your age are at the beach, so any slipups aren't noticed. Finally, several hours later, you have a wide variety of clothes, ranging from semi-formal to beachwear, from tomboy to girly, from "sexy" to "taken". When the cashier asks why you're buying girl's clothes, you tell her some line about your angry girlfriend.
So, you have a car full of clothes now. Where are you going with them?