break up?

Has anyone broken up with their partner and then got back together and the relationship has improved. 
My boyfriend and I sort of broke up yesterday because we'd been fighting a bit and both really stressed, but we talked for 2 hours last night and both decided that we want to give our relationship a chance and try and fix the problems we have. I'm just wondering if anyone has gotten back with a partner and if the relationship improved or it was a mistake?