Welcome, Clay! First off, you made an excellent choice to quit the dip. I'm not sure how much lurking you've done on here, but we ask that folks post roll in their quit groups (yours is December 2014) to get the ball rolling and keep it rolling. Two weeks is huge, but by posting roll, participating on KTC, and building your network, your likelihood of making this quit THE QUIT goes up exponentially. Every single one of us will be quit right there with you.
The "glass case of emotions" you're feeling? Yeah, that's the nic bitch royally fucking with your mind. She has had you under her thumb for so long, it has literally worn you down to a nub emotionally now that you have kicked her to the curb. Depression, irritability, crying - all par for the course and all perfectly normal as you go through the process of exercising that demon from your daily life.
The best advice I can give you today is to tell you that you are an addict and you will always be an addict. There is no "just one" or "I'll quit next week" or "shit, I'm too stressed not to dip". The only way for an active addict to be a recovering addict is to not use at all. One day at a time. Regardless of where your travels take you, remember those words. You are an addict and you will always be an addict. Everything else is up to you.