fuss-budget

from WordNet (r) 3.0 (2006)

fuss-budget
    n 1: thinks about unfortunate things that might happen [syn:
         {worrier}, {fuss-budget}, {fusspot}, {worrywart}]

from The Collaborative International Dictionary of English v.0.48

fussbudget \fuss"budg*et\ n.
   a person who thinks excessively about unfortunate things that
   might happen; one who is excessively concerned about matters
   of trifling importance.

   Syn: worrier, fusspot, worrywart.
        [WordNet 1.5]