Hey, 4 days seems like a pretty big achievement, be proud of yourself.
Sounds like you know how to look after yourself, now the hard part is putting that into practice and staying clean, an hour at a time.
I am trying to tell myself that when I'm having a bad day, just getting into bed and watching a film is ok. Rather than putting pressure on myself constantly to be perfect. I find it hard to say "I am good enough", " what I'm doing is good enough"- maybe you do too, and this is why you struggle and relapse?
Well done on your 4 days, concentrate on making it to 5, rather than feeling bad it isn't 4 months.
Be kind to yourself