Reddit mentions of The Upside of Your Dark Side: Why Being Your Whole Self--Not Just Your "Good" Self--Drives Success and Fulfillment

Deal with the difficulty, my friend, it will help develop you and bring you back to health.

You will have good days and you'll have bad days. The thing is that the bad days are as important as the good. They are necessary, both for your mind to go through in order to recalibrate to sobriety, and they also help develop things in you, such as resilience, consistency, and deeper understanding.

There's a book I've been reading that has helped cement this into my mind even moreso. It's called The Upside of Your Dark Side, and shows how negative emotions can actually be a good thing which help you develop and help you respond to situations appropriately.

For someone undergoing a bit of withdrawl, it's necessary to go through periods of feeling down, periods of feeling anxious. It's all part of the path towards having better days on the good days, to keeping your mind sharp and engaged with the right things, to get you to the lifestyle where you'll experience much greater happiness, autonomy, and effectiveness than you otherwise would have.

Now you've got a puppy! That actually CAN be a very beneficial thing here. It's a living creature that you have to be attentive to, provide for, put on a routine. This marks a new phase in your life, if you commit to that dog. You can use this to propel you forward in your attempt to quit. I know that in my own situation, similar life changes have been what's been keeping me from going back. Make sure you don't let him down! Don't be absent and absent-minded. It'll come naturally as you stay sober, I promise it does work.

Your doing good. The fact that you've made it these four days already is big. This can really set some momentum for you, and know that it does usually get much better after the first week or so.

Good luck, you've got this!