You are a combination of what is going on in my life RIGHT NOW

As I mentioned before - I managed to get over my depression. I have since met a girl and got married - she is also diabetic (type 1) and suffering from depression. When she has bad days, she "gives up" with the sugar thing, so that goes pear-shaped too...which ultimately makes her feel WORSE. She does not have OCD, but she is currently in South Africa with a friend who's whole life has stopped because of OCD. I know the guy - he's a good chap - very clever too - but just has these mental blocks. He cant work, he cant drive, he cant even send an email. He loves drawing, but doesnt, because he thinks it will make something bad happen. Its not silly - its just a block!
I had to fight my feelings with my head. Your brain KNOWS that getting happy wont make bad things happen - but thats not how you FEEL. The two dont reconcile, and you go with what you feel. Unfortunately, when you go with your feelings when you are down, it will obviously want to keep you there.
As far as being worried about getting too happy - remember that you cant control everything. Bad things are ALWAYS going to happen, whether you are happy or sad. But then so will good things happen. Its life. If you are worried about bad things happening, it means that you start to LOOK for them...and trust me...you will find them. But again the same happens the other way around. If you LOOK for good things, you will find them too!
For me, it was about letting go of that "control". I decided to pay attention to the good things in my life, and write off the bad ones. When your perspectives change, YOU change...and life becomes a whole lot easier all around. I know its not something you can do at the drop of a hat, but plant that seed. Keep it in the back of your mind. Keep your eyes open for the good stuff - you have kids - the good stuff is THERE! :)
Dont rush it or force it, but just try keep pointing yourself towards the stuff that makes life worthwhile!
:)