ditto what nikudorei said.....i've done it about 6 or 7 times over the past 4-5 years.
The next day you will feel very blah...just try to watch comedy movies and hang out with light hearted friends until your body recovers.
your seratonin was totally depleted in one night which made you feel fantastic...but now your feeling depressed. You just have to recognize that it's part of the drug and that you will be fine. Don't stress about it.
here's a funny techno themed Strong Bad email for ya
http://www.homestarrunner.com/sbemail45.html