Harder than I thought

I'm trying really hard at this happiness thing I'm trying to achieve. Goodness...I know it doesn't happen overnight, but I'm stuck in a rut of depression and I can't get out of it. I constantly think of the things that are upsetting me and no matter how hard I try to "give them to God", it just doesn't work...probably because I don't know how to "give things to God". Sure, it seems easy enough...or it did when my dad and step mom talked about it, but, I've tried to "give it to God" but I still have the racing thoughts. I try to think, "These are things I have no control over so stop worrying about them, stop obsessing" but it just isn't coming that easy and the more I try, the more frustrated I get. I've been awake since 1:30am this morning. I've kept myself busy cleaning and doing laundry. I guess that's a good thing about not sleeping, but I'm getting damn tired (no pun intended) of not being able to sleep. The kids fight all the time and it's come to the point where I have lost control over them and I don't know what to do. PLEASE...ANY advice about achieving happiness, ending these racing thoughts, giving things to God, or regaining control of my children would be appreciated. I'm desperate.