Working during vacation


Hey guys..........I was wondering if someone could help. I am a 10 year employee and a 7 TCD, not full time yet but will be next any time now. I was on vacation this week but was called in to drive this morning because the center mgr. said they were severely short handed and basically begged me. I agreed and went it. So, because I drove during vacation, am I entitled to a higher rate? Several other drivers seem to think so but I can't find it in the contract and can't reach my steward. Any ideas? Thanks!!!!!