hi there.. it's only been a day.. trust me it will get easier in a few more days and the pain will be gone... Your teeth are forced to move for the first time in years, so that is expected.
Hang in there and start your blog on this site... it will help us help you 
Good luck and congrats on getting braces...
Braced Twice. Wear Your Retainers!
Ceramic Braces On Top and Metal Braces On Bottom, Palatal Expander - First Time Around
Metal braces top and bottom - Second Time
Now Wearing Retainers At Night!