There are plenty of sites that discribe depression you may want google depression symptoms DMV and see what you get.....

basicly if feel like your no longer able to cope the way you use to its time to talk a Dr.....as far as you son go's he could be coping you if he's doing exactly the same behaviours then I'm sure that whats happening but that does not mean he wont need help for him self it just means that will proberly be easier to help him. I have been told my kids must have copied me but they dont have the same behaviours as me NOW they have simular behaviour thay I had when I was young and they were not even born.

Its often said that it never hurts to ask so talk to your Dr please