You decided that it would be nice to give a shot at being on the other side of the fence, and waited patiently for a cute girl to pass by. If you wanted to be a chick, why not a hot one? And as for the first experience you didn't want to get a new life, just a new body, so you didn't mean to switch bodies with anybody. You also didn't want to set a timer, since it sounded awfully useless. After a while you saw a cute girl and decided she'd be the chosen one. After the ritual you found yourself in the body of that girl, feeling a whole lot of new feelings... But you couldn't just stand there, or you'd be seen by the real girl. You hurry to the closest restroom and there you can finally breath. You start checking all the feelings you have now.
First of all the uneasiness caused by your heels, you'll need a while before you'll get used to them, but they kind of make you feel more confident...
Second all your brown curly hair feels really nice, but it sort limits your vision, which is strangely wider than usual.
Third you feel smaller, thinner and weaker, which feels wrong and good at the same time.
Then you start to check out your new body's outfit: she was wearing a school girl uniform and beneath your blouse you can feel your new nice breasts... But what actracts you more is the void you feel down there, and the fact that your body's not wearing any panties now... That girl must have been into something...
What to do now? Check out the body already... Or try some shopping as a girl? (and look for some panties)