feet suddenly hurt for no obvious reason

I'm 16 and for 2 years I have worn the same orthotics because I have flat feet. When I walk my feet roll in and they point out really bad. Last Monday I didn't wear my orthotics because I wore sandals. I can usually go a day without them but by 2 right foot hurt really bad. So I put in my orthotics because that has always helped before but this time it didn't. It is hurting worse now. The pain is on the bottom of my foot right in my arch. Rolling a baseball under it helps until I stop. Today a dull pain started in the same place on my left. Why do my stupid feet hurt? How can I help relieve the pain besides attaching a baseball to the bottom of my foot? We really can't go get the orthotics adjusted because the place has damage from the tornado (we live in Joplin) and it hasn't opened yet.