As others have said photos would be a real help in the ID of both the tree, then the possible cause of your tree's droop.
It could be environmental, loading from winter snow, low moisture levels in the soil, excessive moisture levels in the soil.
It could also be a pathogen, there are lots to choose from but here's a couple that produce the kind of drooping you describe Dwarfmistletoe, which you should be able to detect with close inspection see the attached leaflet (it affects a number of tree species, not just Douglas Firs):
dougfirdm.pdf
It could also be Balsam Woolly Adelgid, a bit of a mouthfull to say, see attached leaflet:
bwa.pdf
Without more info on the tree species its all quess work I'm afraid.
The best advice I can give you is to go to this web page
http://www.isa-arbor.com/findArborist/findarborist.aspx enter your state id in the first search box and hit search that will give you contacts for all the ISA Certified Arborists in Washington State and you can pick the one closest to you to come out and give you an on site assessment of your trees.
Sean
