Sky - I've been through it, too. I would suggest taking lots of time to work it through. Losing your faith and belief system, particularly if it is closely tied with your family and personal identity as JWism is, is traumatic. Depression comes from having your secure faith torn out from underneath your feet.
For a long while I put faith and personal belief on a shelf because it was too painful to try and sort it out. When I was ready (halfway through university), I began to build a new belief system. I was beginning my masters in psychology and one of our first courses required us to identify our personal belief system as a starting point, on the understanding that we would continue to grow and develop and change. As I studied different philosopies I found myself drawn to existentialism. It wasn't until a few years ago, when my grandchildren started asking profound questions about life and god, that I realized I was actually an atheist agnostic. I'm still in the process of identifying what that actually means to me, personally.
I don't think our faith/belief system is set in stone either. I would guess that for most of us it's a journey, with many changes and adjustments along the way. The important thing is to learn and grow and never be afraid to challenge what we believe.