I'm so sorry, Mandosca. I'm sure you're feeling discouraged and disappointed, but try to use it as inspiration and reinforcement that you don't want to live this way anymore.
I can't count the number of times my older teens said the same thing as your son: "Mom, you told me that."... "Mom, don't you remember?" It's one of my biggest motivators.. that I don't want to be that kind of mom. I want to be present for them and have them be proud of me.
Pick yourself up and look at this as a new day! Two months is a great accomplishment. You now know a possible pitfall and can avoid it next time.