Experiences of earlier appointment call backs

Got a call this morning from the breast clinic. Saying my results are back early and I can go to clinic tomorrow and get the results instead of next friday. I don't know if it's a good or bad thing but my mind's in overdrive now. I have an early morning appointment tomorrow so at least I won't have to wait to long at the hospital hopefully. 

Does an early call back often mean it's serious and they need to get treatment done sooner?