@Litebritesnow
One of the cruelties of depression is that it puts the sufferer in an ever deepening hole where it gets harder and harder to climb out, and needs more and more effort, at a time when it's so hard to summon up any effort or energy at all.
It makes you believe that there is no hope, so it's not worth investing in anything to help yourself and your situation. Please believe me, this is the depression talking, and while it may be your reality right now, it doesn't need to be like this in the future. It really is possible for you to feel better and more positive about yourself.
For your own sake though, and your children's, you do need to do something to start that climb out of the hole towards the brightness.
By coming on here and telling us how you feel, you've already started your climb out of the hole, so well done. Now you need to take the next step upwards, and talk to your GP. Anti depressants are absolutely brilliant when you get the right one for you, and will lift your mood so you can begin to function better again and help you see that light as something more achievable than you currently think it is (Do expect some side effects at first though, but it's worth sticking with).
Please do this one initial thing for yourself, and contact your GP. They will support you and help you to get into a more positive headspace. Please accept that it is doable, even if you don't quite believe at the moment you can do it.
I wonder whether it would be useful to ask to be signed off work for a while too, so you can focus on yourself, and feeling more positive? Do you feel this would be a good thing to do?