17 days in is nothing, I'm not sure who led you to believe all would be fun and games once you got clean but it was serious misinformation. Life is better than using, but suddenly you have a whole wave of concerns and problems that weren't there when you were using. Things do gett better, but it takes time. The nature of life is that it's shitty as well as good, but 17 days in you're basically just consumed by all the shittyness from your using and your emotions will be all over the place. It takes hard work for things to get better, so don't think it's going to be handed to you on a plate, but if you do work and put the right action in things will get better.
Keep chipping away, keep being vigilant around your actions, keep thinking positive, keep working hard on your recovery and then things will get better. I would strongly suggest you stop listening to whoever suggested life was going to be a bed of roses as soon as you stopped using because they clearly haven't got a clue what they're talking about.
One love.
I sound like a brat

I'm guessing it had something to do with it being late Friday night and my being sober. And that I'm possibly jealous of the people who say they feel clearer, have more energy, that life is better, though they earned that. And maybe jealous of the people who claim they were high functioning for years and got away with it, when I used to think of myself like that and now don't. It's bullshit really, feeling sorry for myself, it's just an excuse.