Is it possible to go from completely fine, normal and actually happy to DEPRESSED?

A week ago I was doing great, I was happy, probably close to the happiest time of my life. My daughter is healthy and very, very happy, I left a horribly dangerous town in Guatemala and am living a great life in a safer place, I get spoiled constantly by my parents who also spoil my daughter!

The only down thing in my life is that my husband isn't living with me (that's a long story, but we are both still happily married, just getting out of debt). I saw him last weekend, but this weekend won't see him... haven't had sex since last weekend, but that's what our hands are for, no?

My mother took me out for mother's day last night, we went to a casino... and when we got back I felt like my world had crashed... I don't understand why, I've been perfectly fine!

Last night and all morning I felt as though I wanted to cry and seeing just now that I missed my Novela makes me want to crawl under a rock!

From March of last year to January of this year my life seemed to be moving from one spot in to another... but since January ended things have been great! I've already cried for most of the stuff I went through, but not everything... is it possible these other things are catching up to me?? I've not been thinking about them or having nightmares!

What the is up with me?????