Dee first of all depression is not caused by a weakness anymore than cancer is, neither are in your control. mental health is no different than physical health and needs to be brought out into the open and not hidden behind a dark veil of shame.....
Your life has become overwhelming and your mind is trying to tell you that you need some help, don't fight it those of us with depression are not crazy nor weak.
It's normal for us women to want to be the ones that can fix everything, do everything and keep everything under control....when for whatever reason this isn't possible we began to feel somehow responsible,angry, overwhelmed,depressed,tired,hopeless,ashamed etc etc....
don't let this ruin your life find a good therapist to talk to and a psychiatrist to find out if you need some medication...this may only be for a temporary period until life begins to feel like it should.
good luck...we've all been there
For starters, lay off the percocet, that is how drug dependency happens! Try melatonin, you can get it over the counter without a script, it works! Not habit forming and no side effects.
Anyone can have depression, it is not a sign of weakness, but a sign that your body has been stressed way to long and it has stopped making the natural stress hormones that you need to deal with what life throws your way. It could be situational depression, and if that is the case, kick the kiddies to the curb, if they are old enough that they should have left the nest! C a psychiatrist and have your levels taken and there is a good possibility that you may, upon the advice of a doctor need a med to create the hormone for you while your body takes a long needed rest before it can function normally again!